CHEMISTRY TEST PAPER (X)

              TEST PAPER - 1     

        (One hour and a half) 

_______________________________________Section I is Compulsory and attempt any four questions from Section II.

The intended marks for questions or parts of questions, are given in brackets [ ]

________________________________________

         SECTION I (40 Marks)

Compulsory: To be attended by all candidates.

Question 1

a) Answer the following questions relating your answer only to the gases in the list given below:

     Ammonia, hydrogen chloride, Sulphur Dioxide, Nitrogen, Oxygen, hydrogen, nitric oxide, methane, ethane.

 i) Two gases which react under relevant conditions to give a gas which turns a solution of potassium mercuric or iodide brown.

 ii) A gas which is absorb by iron[II] sulphate solution to give a brown addition compound.

iii) Two gases which react to give a reddish brown acidic gas.

iv) Two gases which react in presence of a catalyst at elevated temperatures to give an alcohol.

v) Two gases which react to give a solid which reacts with an alkali to give back one of the reactant gases.             [5] 

b) The following questions pertain to chemical bonding :

 i) Differentiate between the terms -- ' electrovalent bond' and 'covalent bond'.

ii) Draw the electron dot structure and orbit structure to depict the formation of

A) Sodium chloride.

B) Carbon tetrachloride.            

[²³₁₁Na,  ³⁵₁₇Cl, ¹²₆C]                              [6]

c) In this question you are required to supply the word/s that will make each sentence into a correct statement which is to be written down in full.

Example:  Magnesium nitride reacts with water to liberate ammonia.

Answer:  Magnesium nitride reacts with warm water to liberate ammonia.

 i) Activity series is a series arranged according to their decreasing reactivity.

ii) Ammonia reacts with lead[II] oxide liberating nitrogen.

iii) Aqua regia contains one part of a night ride nitric acid and three parts of nitric acid and three parts of hydrochloric acid.

iv) Ethyl alcohol is dehydrated by sulphuric acid at elevated temperatures liberating ethene gas.

v) Anions migrate during electrolysis and get discharged.                                  [5]

d) i) Give a reason why pure water is termed as a non-electrolyte while acidified what is an electrolyte.

ii) Name the product formed at the anode during electrolysis of aqueous sodium silver cyanide solution.

iii) State which of the following salt is weak electrolyte--

 Silver nitrate, Sodium carbonate, Copper chloride.

iv) State which of the following substance contains both ions and molecules ---

 Sodium hydroxide solution, Acetic Acid, molten lead bromide.

v) Write the equation for the reaction which takes place at the anode during electrolysis of acidified water.           [5]

e) i) What is the empirical formula of  compound having the following percentage composition :

Fe= 73.38% and O= 27.62% [Fe=56, O=16] 

ii) Iron pyrites [FeS₂] on roasting in air [oxygen] give iron[III] oxide and Sulphur dioxide. Calculate the weight of iron pyrites which must be roasted to produce 5000 g. of Sulphur dioxide gas. [S= 32].

iii) Combustion of ethane yields carbon dioxide and water vapour. Calculate the volume of carbon dioxide form that STP and the number of moles of oxygen needed for the combustion of 60 g of Ethane.                                          [8] 

f) What do you see when:

i) Bromine is passed into a solution of ethyne in an inert solvent.

ii) Ammonia-oxygen mixture is passed over the heated Platinum.

iii) Le[II] oxide is reacted the dilute nitric acid and the residual solution formed is mixed with sodium chloride solution.

iv) Zinc nitrate is heated strongly in air.

v) Hydrogen sulphide gas is bubbled through concentrated sulphuric acid and the gas liberated is then bubbled through iron[III] sulphate solution.

vi) Excess ammonium Hydroxide is added to the solution formed on reaction between lead carbonate and dilute nitric acid is excess.                                   [6]

g) Write balanced equations for each of the following reactions involving an oxide.

i) Lead[IV] oxide and concentrated hydrochloric acid.

ii) Lead [II] oxide(heated) and Ammonia.

iii) Zinc oxide and dilute nitric acid.

iv) Sodium oxide and Sulphur dioxide.

v) Iron [III] oxide and Aluminium.        [5]

         SECTION II (40 Marks)

        Attempt any 4 questions 

Question  2

a) Define the following periodic properties.

 i) Ionization potential.

ii) Electronegativity.                               [2]

b) State the following pertaining to the Periodic Table.

i) The period of the Periodic Table which has two elements in its period.

ii) The period to which the element carbon belongs.

iii) The elements in period 2 with the highest and potential.

iv) The noble gas present in period 2 of the Periodic Table.                              [4]

c) Supply the missing word/s in the blanks below.

 Sodium is an___metal belonging to group______of the Periodic Table. It has _____ electron/s in its valence shell and is a strong _____ agent.                       [4]

Question 3

a) Differentiate between the following terms:.                                                [3]

i) Basicity of acids and acidity of based.

ii) Concentrated acid and strong acid.

iii) Dibasic acid and diacidic base.

b)i) Define a metal and a non-metal on basis of Ionization.

ii) Compare a metal and a non-metal on basis of reaction with dilute acids.

iii) State a characteristic property of 'alkali metals' present in Group I A with a specific reason for the same.             [3]

c) i) Name an ore of sulphur used in the Contact Process which on roasting yields sulphur dioxide gas

ii) Name the gas evolved when zinc reacts with the final product of Contact Process.                                              [2]

d) State which chemical property of sulphuric acid is involved in the following conversion:

i) Nitre to aqua fortis.

ii) Hydrogen sulphide to sulphur.       [2]

Question 4

a) Give the IUPAC name and common name of the following hydrocarbons--

i) CH₄ 

ii) C₃H₆                                               [2]

b) i) Give a reason why the compound in a(i) above is called saturated organic compound.

ii) State the characteristic and typical reactions of the organic compound in  a(i) above.

iii) Draw the electronic structure of the organic compound C₂H₂.          [3]

c) i) Name the first chlorination product obtained when CH₄ and C₂H₆ react with chlorine respectively.

ii) What is the special feature of C₂H₄ and C₂H₂ which differentiates them from the hydrocarbons in a(i) above.

iii) What type of reactions undergone by the compounds C₂H₄ and C₂H₂.

iv) What is added to ethyl alcohol to obtain ethene in its laboratory preparation.                                       [5]

Question 5

a) What must be added to sodium chloride in the laboratory preparation of Hydrogen chloride gas.                     [1]

b) Write the equation for the reaction which takes place in (a) above.           [1]

c) Starting from hydrochloric acid how would you obtain --

i) Chlorine using lead [IV] oxide.

ii) Chlorine using bleaching powder.

iii)  Carbon dioxide using a soluble metallic carbonate.

iv) Hydrogen sulphide using a metallic sulphide.                                               [4]

d) Name the following:

i) A salt formed when hydrogen chloride reacts with heated iron.

ii) The oxidizing agent in Aqua regia.

iii) A metallic chloride insoluble in water and dilute nitric acid but soluble in liquor ammonia solution.

iv) The neutral gas obtained when hydrogen chloride undergoes thermal dissociation.                                         [4] 

Question 7

a)  Calcium nitrate decomposes on heating to give calcium oxide, nitrogen dioxide and oxygen.

i) Write the balanced equation for the thermal decomposition.

 Calculate:

ii) The volume of Nitrogen dioxide obtained at STP.

iii) The weight of the calcium oxide obtained when 4.1 g of calcium nitrate is heated. [Ca= 40, O= 16, N= 14]            [4]

b) Ammonia burns in oxygen of the air with a yellowish green flame, forming nitrogen and water as the only products.

i) Write the balanced equation for burning of ammonia in oxygen.

ii) Determine the volume of oxygen used and the volume of Nitrogen obtained when 400cc of ammonia burns in oxygen.                                                   [4]

c) Calculate the percentage of oxygen in nitre. (K=39, N= 14, O=16).                  [2]

QUICK REVISION TEST (BIOLOGY)

MODEL TEST PAPER - 1

1) Name the following:

a) A pollutant which reduces the oxygen carrying capacity of blood.

b) the male reproductive cells of mammals.

c) Sheet of muscles between the Thorax and abdomen and mammals.

d) The element required for clotting blood in man.

e) The tube that leads from the ovary to the uterus.

f) Openings found on the undersurface of dorsoventral leaves.

g) Tissue concerned with upward conduction of water in plants.

h) Condition of cell in which cell contents are shrunken.                        (8)

2) complete the following sentences (i) to (IV) given below by filling in the appropriate word or terms from the list given below:                                         (4)

Osmosis, Ciliary muscles, Aorta, Stapes, Malleus, Diffusion. Dorsal aorta, bronchioles, Iris.

a) the part of the eye responsible for change in the size of the pupil is the__

b) The process by which the molecules distribute themselves evenly within the space they occupy is termed_____.

c) The blood vessel leaving the left ventricle of the mammalian heart is the ___

d) The ear ossicle in contact with the oval window of the inner ear is the___

3) Mention if the following statements are TRUE or FALSE:                        (4)

Rewrite the wrong statements from one to six above the correct form by changing only the first or the last word.

a) Pregnancy in women can be prevented by the method of vasoctamy.

b) Cones are the receptor cells in the retina of the eye sensitive to dim light.

c) The unit of light absorbed by the chlorophyll during photosynthesis is the proton.

d) The parts of the ear of associated  with balance is the cochlea.

4) Give one point of difference between any three of the following pairs, on the basis of what is indicated in the brackets:.                                           (4)

a) sensory and motor neurons(function)

b) blood and lymph (composition)

c) Dicot and monocot stem(Arrangement of vascular bundles)

d) ureter and urethra(function)

5) Complete the following table by filling in the correct location of the following structure in the human body and mention one main function of each:

                                                               (5)

Structure        Location            Function

a) epiglottis 

b) Eustachian tube 

c) Cordae tendinee

d) Nephron

e) Organ of corti

6) Write briefly as indicated in the brackets, on the following :.            (4)

a) Myopia(symptoms and cause)

b) Red blood corpuscles (Origin and Function)

c) Tympanum( location and function)

d) mitochondria(structure and function)

 

7) Answer briefly in the following questions :.                                          (4)

a) Why are capillaries thin walled ?

b) Mention two functions of the choroid coat in the eye.

c) What is meant by 'gestation' period?

d) What is the effect of shivering?

e) What is meant photolysis of water?

8)a) Define transpiration.

b) Describe an experiment to prove that transpiration occurs more from the under-surface of dorsoventral leaves. (4)

 

9) Give a proparate terms for the following :

a) A membrane that surrounds the foetus and secrets a protective fluid.

b) Protecting coverings of the brain and spinal cord.

c) A statistical study of human population.

d) Substances that are applied to the surroundings where germs thrive and multiply.

e) The inward movement of solvent molecules through the plasma membrane of a cell.

f) Loss of water in the form of droplets from the marginal of a leaf.

g) Adjustment of the eye in order to obtain a clear vision of objects at different distances.

h) The small amount of inhaled air in the respiratory tract that does not take part in gaseous exchange.                       (8)

10) Explain briefly the idea containing any five of the following statements:

a) Oxygen given out during photosynthesis comes from water.

b) The need to linit the size of the family is more vital today than ever before. Give two examples.

c) Root hairs become flaccid, when fertilizers are added to the moist soil around it.

d) Transplanting of seedling to a flower bed in the evening is better than doing so in the morning.

e) In summer, urine is slightly thicker than in winter.

f) Man can live without food for a number of days but he cannot survive without oxygen for more than a few minutes.

g) Environmental pollution is the recent problem. Do you agree ? Give two reasons to support your answer.      (10

QUICK REVISION PHYSICS NUMERICALS (X)

Electric Power and Household Electricity

1) An Electric heater is rated 500 kVA, 200V. If  the heater is operated for 1 hour, calculate the energy consumed 

A) in kWh .                              500 kWh

B) in Joule.                          1.8 x 10⁹ J

2) Convert 1 kWh into joule.

Ans) 1 kWh= 1000W x 3600      

                   = 3.6 x 10⁶ J

3) An electric bulb is marked 200V - 100 W. The bulb is connected to a 220 V supply.

Calculate

A) the resistance of the filament.    484

B) current flowing through the filament.    0.454 A

C) is the filament resistance of the glowing bulb greater, smaller or same as compared to its resistance when it is not glowing ?     

Ans) The filament resistance of the 'on' bulb is greater because it is at a higher temperature when it is 'on' as resistance of material is known to increase with an increase in temperature.

4) A refrigerator is marked 80W, 220V.

A) How much energy does it consume in one day if on an average it is used for 20 hours a day ?                         1.6 kWh

B) What is likely to happen if the voltage drops to 50 V.          

Ans) If voltage drops a large current will flow through it and damage the refrigerator.

5) What quantity of heat will be produced in a coil of resistance 80 ohm if current of 3 A is passed through it for 4 second.                     2880 J

6) Calculate the electrical energy in SI units consumed by a 100 W bulb and a 60 W fan connected in parallel in 5 minutes.                    48000 J

7) A family uses a light bulb of 100 W, a fan of 100 W and electric heater of 1000 W each for 8 hours daily. If the cost of electricity is ₹2.00 per unit, What is the expenditure for the family per day on electricity ?                     ₹19.60p

8) A bulb is marked 100 W,to 220V and an electric heater is Marked 2000 W, 220 V

A) what is the rat ratio of their resistances?                    20

B) In which of the above thicker connecting wire or lead is required ?

Ans) The currents, flowing through the bulb and the heater, are (100/220) ampere and (200/220) ampere respectively. Thus the current, through the heater, is as much as 20 times than that through the bulb. Therefore, a thicker connecting, wire, or lead, will be required for the electric heater.

9) A geyser has a label 2kW, 240 V, What is the cost of running it for 30 minutes, if the cost of electricity is ₹3.00 per unit ?    ₹3.00

10) Two fuse wires of the same length are rated 5 A and 20 A. Which of the two fuse wires is thicker and why ?

Ans) The fuse wire related to 20A would be the thicker of the two. The thicker wire (for the same length and material) would have a lower resistance than the thin wire. It will, therefore, produce less heat for a given current. it can, therefore, carry much larger current through it before melting down.

11) An electric kettle is rated 2.5 kW, 250V. Find the cost of running the kettle for two hours at 60 paise per unit.    ₹3.00

12) An electrical appliance is rated 1500W, 250V. This appliance is connected to 250 V mains. Calculate:

A) the current drawn.           6A

B) the electrical energy consumed in 60 hours.                90 kWh

C) the cost of electrical energy consumed at ₹ 2.50 per kWh.       ₹225

13) What is the resistance of 1000W, 220 V toaster ?             48.4 ohm

14) What is the commercial unit of electrical energy ? Convert it into joule. What is the other name of the commercial unit ?

Ans) The commercial unit of electrical energy kilowatt-hour (kWh).

1 kWh = 1kW x 1 hour

           = 1000W x 3600s

           = 1000 J/s x 3600 s

           = 3.6 x 10⁶J

It is also called Board of trade unit (B.O.T.U)

15) What is the resistance of an electrical arc lamp, if the lamp uses 20A when connected to 220 volt line ?    11 ohm

SOUND

1) If the sound takes 2 seconds to reach the boatman, approximately how much time does it take to reach the driver ? (v= 1450 m/s).                          0.95s

2) A person standing between two vertical cliffs and 640m away from the nearest cliffs shouted. He heard the first echo after 4 second and the second echo 3 second later. Calculate

A) the velocity of sound in air.      320m/s

B) the distance between the cliffs.   1760 m

3) Radioa waves of speed 3 x 10⁸ m/s are reflected off the moon and received back on the earth, the time elapsed between the sending of the signal and receiving it back on the Earth's surface is 2.5 seconds. What is the distance of the Moon from the Earth ?       3.75x 10⁸ m/s

4) An observer stands at a distance of 850 m from the cliff and fires a gun. After what time gap will he hear the echo, if sound travels at a speed of 350 m/s in air ?                                      4.86s

5) A radar is able to detect the reflected waves from an enemy aeroplane, after a time interval of 0.02 milliseconds. If the velocity of the waves is 3 x 10⁸ m/s, calculate the distance of the plane from the radar.                                            3km.

6) An observer, situated between two parallel cliffs, emits an intense sound note. Two successive echoes are then heard after 5s and 7s. Calculate the distance between the cliffs (velocity of sound = 340 m/s).                       2040m

7) A person standing between two cliffs and 640 away from the nearest cliff produces a strong sound. He gets the first echo after 4 second and the second echo 3 second later. Find

A) the velocity of sound in air.      320 m/sec

B) The distance between the cliffs.   1760 m

8) A radio signal, sent towards the surface of the Moon, is received back on the earth after 1.5 seconds. If the speed of the radio waves is 3 x 10⁸ m/s, find the distance of the Moon from the Earth.     2.25x 10⁸ m

9) Radio waves of speed 3x 10⁸ are reflected off the moon and received back on earth. The time elapsed between the sending of the signal and receiving it back at the earth station is 2.5 secs. What is the distance of the Moon from the Earth ?      3.75x 10⁸m

10) An observer stands at a distance of 850m from a cliff and fires a gun. After what time-gap will he hear the echo, if sound travels at a speed of 350 m/s in air ?                                                  4.86s

MACHINES

1) A cook uses a 'fire tong' of length 28 cm to lift a piece of burning coal of mass 250g. If he applies his effort at a distance 7cm from the fulcrum, what is the effort in SI unit. g= 10ms².       10N

2) A woman draws water from a well using a fixed pulley. The mass of the bucket and water together is 6.0 kg. The force applied by the woman is 70 N. Find the MA. g= 10m/s².                          0.86

3) The mechanical advantages of a machine is 5 and its efficiency is 80%. It is used to lift a load of 200 kgf to a height of 20 m. Calculate

A) the effort required.               40 kgf

B) the work done on the machine.   50000 J 

4) In a single movable police system a load of 250 kgf is lifted by an effort of 150 kgf. Find the percentage efficiency of system.                  83.3%

5) A crow bar of length 100 cm is used to lift a load of 10 kgf. It has its fulcrum at a distance of 25 cm from the load. calculate 

A) the mechanical advantage of crow bar.                     3

B) the effort applied at the other end.    3.33 kgf 

6) A cook used a 'fire tong pair' of length 32 cm to lift a piece of burning coal of mass 500g. If he applies his effort at a distance of 8 cm, from the fulcrum, what is his effort ? Assume friction, etc., to be absent. Also, obtaine values of the MA and the VR of this machine.      2 kgf, 0.25, 0.25

7) A simple machine enables us to lift a load of 10000N by the application of an effort of 500 N. However, when the point of application the effort moves through 2.5m, the load gets raised through 10 cm only. What are the values of the 

A) MA,        20

B) VR,         25

C) efficiency of the machine ?      80%

8) In a single movable system, a load of 125 kgf is lifted by an effort of 75 kgf, if velocity ratio of this pulley is 2, find

A) MA.                    5/3

B) efficiency.          83.3%

9) Find the effort required to lift a stone of mass 120kg with the help of a lever 1.5 m long, If the lever arm the 0.3 m. g= 10 ms².                               300 N

10) Find the mechanical advantage of a lever in which the load arm is 2 cm and the effort arm is 30 cm.               15

11) A machine is operated by an effort of 80 N acting downward and moving through a downward displacement of 0.15m. The load of mass 10 kg, is raised up by 10 cm. Calculate the 

A) MA.            1.25

B) VR.          1.5

C) work input.            12 J

D) useful work output.         10 J

E) efficiency.        83 3%

12) A woman applies a force of 60 N to draw a 5 kg bucket of water from a well, asuming a fixed Pulley. Assuming that all the extra force applied is to overcome frictional forces, calculate the force of friction, MA and efficiency.      10N, 0.83, 0.83, 

13) An effort of 10 N is applied at the free end of the string passing on a single movable Pulley system with a L attached to it. The weight of the movable pulley is 3 N. The frictional forces are negligible.

A) calculate the mass of the Lord being raised.          1.7 N

14) A worker is pushing a box weighing 1500 N up a ramp 6.00 m long onto a platform 1.5m above the ground ? What is the mechanical advantages and what is the effort applied ?      4, 375 N

15) An effort of 6 kgf is applied on a machine through a displacement of 90 cm, when a load of 100kgf moves through a distance the 4cm. calculate

A) velocity ratio.            22.5

B) MA.         16.66

C) % of efficiency.      74%

16) Calculate the MA of a lever in which the effort arm is 30cm and the load arm is 7.5 cm

17) A long rod of length 100cm has its fulcrum situated at a distance of 10 cm from the load. Calculate the MA of the rod.            9

18) A pulley system lifts a load of 600 N by an effort of 200 N. If the resistance due to movable parts of machine and function is 400 N, find

A) number of pulley in system.          5

B) efficiency.                    60%

MODEL TEST PAPER -4 (CHEMISTRY)

₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉

Time: 1 Hour 30 Mins.          F.M-40 

Attempt all questions from Section A and any three questions from Section B 

                  SECTION A 

            (Attempt all questions) 

Question 1.                                   (10

Write the correct option only 

i) Carbon reduction is not used for the extraction of--- 

A) Fe B) Na C) Zn D) Pb 

ii) Roasting is a process of a heating--- 

A) In presence of air B) In absence of air C) In presence of a water D) In absence of water 

iii) Froth floatation is used the concentration of--- 

A) oxide ore B) carbonate ore C) Sulphide ores D) chloride ore 

iv) Nichrome is made up of -- 

A) Cu + Zn+ Al B) Ni + Fe+ CR C) Pb+ Sn+ SB D) Na+ Hg + Cu 

v) The aim of the Fountain experiment is -- 

A) HCl is denser than air B) HCl turns blue litmus red C) HCl is highly soluble water D) HCl fumes in moisture air 

vi) The chemical used in the brown ring test is -- 

A) CuSO₄ B) ZnSO₄ C) Fe₂(SO₄)₃ D) FeSO₄ 

vii) Carbon to Carbon double bond is found in-- 

A) Acetaldehyde B) Acetic Acid C) Ethyl alcohol D) 2-butylene

vii) The gas evolved when dilute sulphuric acid reacts with iron sulphide --- 

A) Sulphur Dioxide B) Nitrogen dioxide C) carbon dioxide D) hydrogen Sulphide 

ix) Which one of the following has maximum boiling point--- 

A) Ethane B) Propane C) Butane D) Pentane 

x) IUPAC name of the following compound is-- 

                CH₃ 

                  | 

     CH₃--- CH --- CH₂--- OH is 

A) 2 methyle propane -3 -ol  

B) 2 - 2 dimethyl butanol 

C) 2 methyl propane - 1 - ol 

D) 3 methyle propane -1 - ol 

              SECTION - B 

(attempt any three question from this section)

Question 2.

i) Write cathode and anode reaction for extraction of aluminium in Hall- Heroults process.                       (2)

ii) Select the correct answer from the brackets to complete the following statements.                (2)

a) Zinc blend is converted to oxide by ___(roasting/calcination) process.

b) The catalyst used in the oxidation of ammonia is ____(zinc/ Platinum).

iii) A substance 'A' was heated with slaked lume, a gas B obtained with a pungent smell. Name the substance A and B and write the balanced equation.                   (3)

iv) What is a Aqua regia ? Write the reaction how it give soluble chloride ?                                                   (3)

 Question 3.

i) Define pulverization and calcination.                                 (2)

ii) Name the compound formed when :

   a) When Ammonia and hydrochloric gas react.

  b) Ethane react with hydrogen in presence of platinum catalyst.

iii) Write the chemical equation for the preparation of NH₃ in laboratory ? Why H₂SO₄ is not used as a drying agent for NH₃.                               (3)

iv) Name the following organic compound.                                    (3)

a) The first homologous whose  general formula is CₙH₂ₙ.

b) The compound formed by complete chlorination of ethyne.

c) When 1-2 dibromoethane is boiled with alcoholic KOH which product is formed.

Question 4.

i) Write two ores of Almunium.   (2)

ii) Name one alloy that contains Almunium.

iii) Identify the terms for the following:.                                     (3)

 a) The electrodes where oxidation takes place.

 b) The process by which crude metal is purified.

 c) A method used to collect HCl gas.

iv) Complete the table given below: (3)

Name-process  reactant     product

a) ____.        oleum+H₂O         H₂SO₄ 

b) ___   Nitrogen+ H₂             ____

              Tem-450°

             pressure -200atms

           Catalyst Fe & Mo 

Question 4

i) a) Which product is formed when HCL and NH₃ react together?

 b) What is the change of CuO takes place when NH₃ gas is passed through over heated CuO?          (2)

ii) Write the IUPAC nomenculture of the following compounds 

a)     CH₃--CH--CH₂--CH--CH₂--CH₃

                    |                | 

                   Br             Cl 

  

        

             O

             ||                 

b) CH--C--CH₂--CH₂--- CH₃.            (2) 

iii) Write the formula of the product: (3)

 a) C₂H₅Br + KOH(aq)---> 

 b)  C₂ = C₂ + HBr --->   

 c) CH₂ = CH₂  (alkaline)(KMnO₄)-->  

iv) Name the hydrocarbon which is:

a) tetrahedral molecule.

b) A planer molecule.

c) a linear molecule.                    (3)

Question 6.

i) Write two isomers of the compound with molecular formula C₂H₆O.                                            (2)

ii) What is the general formula of alkene and write the name of smallest alkalane ?                      (2)

iii) Write the balanced equation for the following conversions:

 a) When Ammonium Nitrate is heated ?

 b) When hydrogen Sulphide react with sulphuric acid ?

 c) methanol is heated with con.H₂SO₄ at 170°C                      (3)

iv) Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br ---CH₂Br 

      Br₂CCl₄

 A -----------> CH₂--Br--CH₂--Br 

 a) Draw the structural formula of A ?

  b) What type of reacts has A undergone ? 

 c) What will you observe ?         (3)

QUICK REVISION CHEMISTRY

FILL IN THE BLANKS

1) The serial number of an element in the Periodic table is also its____ (atomic number/ mass number)

2) The metallic character___ in a Group as one moves from top to bottom.( increases/ decreases)

3) The metallic character___ in a period as one moves from left right.(increases/decreases)

4) ____is the most active non metal.(chlorine/iodine)

5) ___ is the most active metal (magnesium/Sodium)

6) An increase in nuclear charge ___ the tendency of an atom to accept electrons. (increases/ decreases)

7) The atomic size ___as one moves from left to right across a period (increase/ decreases)

8) The elements in a Group VIIA which is a liquid at room temperature is ___(F/Cl/Br)

9) Nuclear charge of an atom is the ____Negative/positive) charge on the nucleus of an atom equivalent to the atomic__ (number/mass)of an atom.

10) Atomic size of neon is___ than the atomic size of chlorine. (more/ less)

11) With increase to nuclear change the nuclear attraction for outer electron ____(increases/ decreases). Hence Ionisation potential.(increases/ decreases)

12) If an element has one electron in its outermost shell, then it is likely to be___(non metallic/ metallic)

13) The properties of elements are periodic functions of their___ (atomic numbers/mass numbers)

14) The elements below the sodium in the same Group would be expected to have a ___(lower/ higher) electronegativity than Sodium and the element above chlorine would be the expected to have a___(lower/higher) Ionisation potential than chlorine.

15) On moving from left to right in a given Period, the number of shells__(remains the same/increases/decreases)

16) On moving down a Group, the number of valence electros____ (remains the same/increases/decreases)

17) Two chlorine atoms combine to form a molecule. The bond between them is ___(ionic/ covalent)

18) In forming oxygen molecule,_ electrons are shared by each atom of Oxygen. (Two/three)

19) The number of single covalent bonds in a C₂H₂ molecules are___ (2/1)

20) Jn forming N₂ molecule, ____ electrons are shared by each atoms of Nitrogen. (3/2)

21) Two atoms of the same element combine to form a molecule. The bond between them is known as ___(ionic/covalent)

22) Methane is a ___compound. (covalent/ionic)

23) CCl₄ is a ___compound. (covalent/ ionic)

24) Halogens have a tendency to ___ electron readily. (lose/gain)

25) ___ is a process by which electrons are apparently removed from an atom or an ion. (Oxidation/reduction)

26) An oxidizing agent is___ of electrons (an accepter/a donor)

27) ____ compounds undergo ionic reactions. (Electrovalent/ covalent)

28) A ____bond is a pair of electrons shared by two atoms. (Ionic/covalent)

29) The bond in the hydrogen molecule is called a___ bond. (single/double)

30) A covalent bond that is shared equally between two bonded atoms is called a ___ covalent bond(polar/nonpolar).

31) The ability of an atom to attract shared electrons is called its ___.(electropositivity/ electronegativity)

32) A reaction between a base and an acid in their solutions to produce salts and water only is called ___reaction. (double decomposition/neutralisation)

33) All nitrates of metals are___. (soluble/insoluble)

34) Sodium chloride is __salt. (a hydrated/an anhydrous)

35) Chemical name of washing soda is ____.(sodium carbonate/ Sodium Sulphate)

36) sodium potassium sulphate is a _____.(Complex salt/mixed salt)

37) The number of replaceable Hydroxide ions formed by one molecule of a base in water is known as ____.(acidity/basicity)

38) An acid used to remove ink stains is ___.(citric acid/oxalic acid)

39) ammonium chloride is a soluble salt prepared by ___. (precipitation/neutralization)

40) The formula Sodium plumbate is______.

41) The colour of hydrated zinc sulphate is ____.(blue/white)

42. On adding aqueous solution of Ammonium hydroxide to ferric chloride. a ____colour precipitate of ferric chloride is formed. (reddish brown/sky blue)

43. The valency of Copper in copper sulphate is ___.(1/2)

44. zinc chloride solution reacts with caustic soda solution to give 8___ colored participate. (Red/white)

45. The salt of lead, soluble in hot water and in cold water is____. (Lead sulphate/lead chooride)

46. Powdered sodium chloride (common salt) does not conduct electric current. but it does so when dissolved in____.(alcohol/ water)

47. During electrolysis, ___ions move towards the cathode. (positive/negative)

48) In an electrolytic cell__ energy is consumed. (mechanical/ Electrical)

49) NaCl is a poor conductor of electricity in ____state. (molten/ solid)

50) Conducting nature of______ compound is due to free ions. (ionic/covalent)

51) Substances which conduct electricity in the solid state are generally___. (Metals/non metals)

52) The electron releasing tendency of zinc is ___thsn that of copper. (less/more)

53) The conductivity of an electrolyte ____with rise in temperature. (decreases/ increases)

54) During electrolysis of copper chloride___ is deposited at the cathode. (copper/chlorine)

55) cations are ___charged ions. (negatively/positively)

56) According to ionic theory the number of Ions___ with dilution in weak electrolytes (increases/ decreases)

57) _____ is a weak electrolyte as well as weak acid. (CH₃COOH/NH₄OH).

58) Fe + CuCl₂ ---> Cu+ ___.(FeC₃/FeCl₂

59) Pure water consists almost entirely of___ (Ions/ molecules)

60) We can expect that Pure water ___normally conduct electricity. (Will/will not (

61) As we descend the electrochemical series containing cations to get ___ at the cathode increases. (Oxidised/reduced)

62) The ___ the concentration of an ion in a solution, the greater is the probability of its being discharged at its appropriate electrode. (Higher/lower)

63) The metal plate through which an electric current enters into an electrolyte is called___. it has ___ of electrons.

64) A base as an electrovalent compound which when dissolved in water, dissociates into a positively charged____ ion and negatively charged___ Ion.

65) the ions which discharge on the negative electrode during electrolysis ___electrons and are called____.

66) In electrorefining of copper___ is deposited at the cathode and___ at the anode.

67) A salt is an electrolytic made up of a positive Ion other than___ Ion and a negative ions other than___ion.

68) With platinum electrodes hydrogen is liberated at the ___ and oxygen at the___ during the electrolysis of acidified water.

69) electrolysis is the passage of ___ through a liquid or a solution accompanied by a change __ change.

70) An____ is a homogeneous mixture of two or more metels or a metal and a ____.

71) The properties of an alloy are not necessarily____ between those of its ____. The melting point of an alloy is always less than that of its constitution_____.

72) An alloy in which ____ is present as one of the Constituents is called a____ alloy.

73) Alloy are made to develop certain____ properties not___ by elements.

74) The ore from which Aluminium is extracted must first be treated with ___so that pure aluminium oxide can be obtained

75) Pure Aluminium oxide is dissolved in ___to make a conducting solution.

76) When lead nitrate is heated. The Residue of ___is left. The gases founder are____ and ___.

77) The properties of an aqueous solution of nitric acid are due to the presence of hydrogen ___.

78) The property of Sulphuric Acid which is used in the laboratory preparation of Nitric acid is its ____nature.

79) The nitric acid prepared in laboratory is___ in colour but the pure concentrated acid is a___ liquid.

80) Compounds having the same molecular formula but having different structural formula are called ____(homologous/isomers)

81) Organic compounds are___ compounds. (ionic/covalent)

82) The organic compounds containing carbon and ___atoms only are called hydrocarbons.(oxygen/hydrogen)

83) Organic compounds are generally insoluble in____.(organic solvents/water)

84) C=C bond is ___than C-C bond. (Longer/ sorter)

85) An alkyl group is formed by removing a ___atom from the parent alkaline. (carbon/ hydrogen)

86) Ethanol containing some methanol added to it is called___ alcohol.(ethylated/methylated)

87) The next higher homologous of methanal is ___( propanal/ ethanal)

88) The conversion of Ethanol to ethene is an example of___ (dehydration/dehydrogenation)

89) converting ethanol to ethene requires the use of ___ (concentrated hydrochloric acid/ concentrated nitric acid/ concentrated sulphuric acid)

90) The conversion of Ethene to Ethane is an example of ____.(hydration/hydrogenation)

91) The catalyst used in the conversion of Ethene to Ethane is commonly ___(iron/Cobalt/Nickel)

MODEL TEST PAPER -2 (Life Science) W. B

Time: 3 hours 15 minutes
Full Marks:90

               Group -A
(Answer to all questions)

1. Write the answer in complete sentence by choosing the correct answer for each question will respectively serial number:   1x15

1.1) The gland which according to you is known as master gland is:
A) pituitary B) adrenal C) pancreas  D) thyroid

1.2) which of the following breaks dormancy and causes germination of seed--
A) Auxin B) Gibberellin C) Cytokinin D) Ethylene

1.3. Select from the following the number of cranial nerves present in human beings--
A)10 pairs B) 12 pairs C) 24 pairs D) 31 pairs

1.4. The name of the sugar present in DNA is--
A) Ribose B) Pentose C) Deoxyribose D) glucose

1.5. The type of asexual reproduction found in planeria is
A) Fragmentation B) Spore production C) regeneration D) budding

1.6. A person is passing through the period between childhood and maturity. Choose the time period he is passing through--
A) 10-19 years B) 15-25 years C) 13-19 years  D) 25-35 years
1.7. He performed experiments on heredity and is known as father of genetics. He is
A) Lamarck B) Darwin C) Mendel D)  Johanson

1.8. Deduce the type of gametes that could be formed from YyRr--
A) 3 types B) 4 types C) 5 types D) 2 types

1.9. A boy can roll his tongue while another boy can not. They are each others--
A) variations B) locus C) characters D) genotype

1.10. Identify the oldest fossil of horse from the following--
A) Pliohippus B) Merychippus C) Mesohippus D) Eohippus

1.11. The present in fish that helps to maintain buoyancy is--
A) gill B) swim bladder C) tailfin D) thoracic fin

1.12. the theory "Struggle for existence" was proposed by
A) Lamarck B) Hugo-De-Vris C) Weismann D) Darwin

1.13. the nitrogen fixing bacteria which is present symbiotically in roor or leguminous plant is-
A) Azotobacter B) Clostridium C) rhizobium D) nitrobactor

1.14. you have visited a hotspot in india where you find one-horned rhino. you have visited
A) sundaland B) western ghats and lanka C) Indo-Burma D) Eastern Himalayas

1.15. The chemical used in Cryporeservation is
A) liquid oxygen B) liquid nitrogen C) liquid carbondioxide E) liquid methane

            Group - B

2. Answer any 21 questions of 26 questions given below as instructed.                  1x 21= 21
Fill in the blanks with proper words in the following sentences (any five):.                   1x5= 5

2.1. the three layers covering of human brain is called___

2.2. the unit of asexual reproduction is____

2.3. The importance of ____ chromosome is maximum to determine the sex of human being.

2.4. The theory of origin of new organ to meet the demand is the opinion put forward by____

2.5. ___ is a disease you will find in an area suffering from water pollution.

2.6. The Asian lion can be found in the ____sanctuary of Gujarat.

Decide whether the following statements are true or false (any five).                      1x5= 5

2.7. Insufficient release of STH can make a child dwarf.

2.8. In cross pollination there is no need of carrier.

2.9. when a pure tall and a pure dwarf plant are crossed then the offspring produced is a hybrid.

2.10. Cactus could survive without water at a stretch in the hot desert conditions.

2.11 Chewing of tobacco can lead to asthma.

2.12. A high intensed sound can cause damage to our digestive tract.

Match the words and rewrite the correct pair mentioning the serial number of both the columns.  (Only five):.              5x1= 5

Column A
2.13. Amoeba
2.14. DNA
2.15. Incomplete dominance
2.16. Bee dance
2.17. greenhouse gas
2.18. Meiotic cell division

Column B
a) carbon dioxide
b) Pseudopodia
c) evening glory
d) crossing over
e) communication
f) Singlila
g) Double stranded

Answer in a single word or in a single sentences (any 6):.   1x6=6

2.19 choose the odd one and write it:
Oxytocin, Prolactin, Follicle Stimulating Hormone, Luteinising hormone.

2.20. A plant hormone acts as chemical messenger. "explain the statement.

2.21. A pair of related terms is given below. On the basis of the relationship in the first pair write the suitable word in the gap of the second pair.
Planaria: regeneration:: Yeast: __

2.22. In guineapig, black fur is dominant over white fur, Suggest what would be the probable genotype of a white guineapig.

2.23. Deduce what happens when male gametes(22A + X) fuses with female gamete.

2.24. Name the organs whose origin are same but they function differently.

2.25. There is a industry near a locality sending out smoke. Write the name of a disease that can spread in the locality because of it.

2.26. An alkaloid obtained from a particular plant is used to reduce the high blood pressure. Recollect the name of that plant and write it.

                     Group-C

3. Answer any 12 questions in 2- 3 sentences out of 17 questions given below.             2x12= 24

3.1. you are concentrating upon your studies when suddenly an intense torch light flashes upon your eyes. Explain your reaction and the mechanism behind it.

3.2. Discuss about the pituitary gland on the basis of following points--
   • location
   • Two major divisions

3.3. A bird is flying in sky. Explain how its feathers, the remiges and the rectices are helping in its action.

3.4. Why does a plant acquire bushy appearance well its terminal end is nipped off regularly? explain this with the role of plant hormone.

3.5. Differentiate between sexual and asexual reproduction on the basis of the following points--
   • number of parental organisms required.
  • nature of offsprings produced.

3.6. justify what may happen if the cell cycle does not take place properly.

3.7. why is alteration of generation important in ferns.

3.8. you are given a tall pea plant bearing violet flowers. Deduce the probable genotype of the pea plant.

3.9. with the help of a cross calculate the percentage of normal children produced from a colour blind carrier mother and a normal father.

3.10. Recall and write the phenotype and genotype ratio of F² generation of a cross between a pure yellow round seeded pea plant with a pure green-wrinkled seeded pea plant.

3.11. Discuss the role of air sac in the adaptation of pigeon.

3.12. Recall the names of the gases used in Miller and Urey's experiment and write down the ratio in which they were used.

3.13. Justify with two reasons how modern horse has gradually evolved from its forerunners.

3.14. why is Ammonification considered to be an important stage in nitrogen cycle ?

3.15. Why is sundarban called biosphere reserve ?

3.16. write two problems due to population explosion in your city.

3.17. write two difference between in-situ and ex-situ conversation on the basis of
• place of conservation
• access of public

            Group- D
Write the six questions on their alternatives given below. The mark allotted for each question is 5(the division of marks is either 3 + 2, 2 + 3 or 5)

4. Answer 6 questions or there alternatives given below: 5x6= 30

4.1. Draw this structural and functional unit nervous system and label.                       3+2= 5
A) Dendron B) node of Ranvier C) Schwann cells D) Axon Hillock
OR
Draw the Anaphase stage of animal cell division and label the following parts --
A) centrosome B) chromosomal spindle fibres C) continuous spindle fibre D) Chromatid.

4.2. A baby is born a few days ago. Discuss the phases of growth taking place in its body. Mention which part of a flower develop into a fruit which part in to seed after fertilization takes place.                                3+2= 5
OR
You have brought a rose twig from your friend's house and planted it in your garden. Discuss the method you have adopted and why?
How will you differentiate between the cell division of a somatic cell and a reproductive mother cell on the basis of --
• nature of chromosome division
• number of daughter cells produced.

4.3 With the help of checker board and showing cross upto F² generation examplify how Mendel deduced his first law. State the law.                 3+2= 5
OR
Differentiate between Thalassemia and and beyond haemophilia on the basis of the following points--
• type of chromosomes affected.
• symptom
Discuss what should be done to prevent birth of more children suffering from genetic diseases and how can you do it ?    2+3=5

4.4. How does camel dehydration in the desert condition ? discuss the psychological adaptation of sundari in the salt water condition.               3+2= 5
OR
Discuss how wings of bat and birds indicate convergent evolution. there is a garbage dumping station at a place. Discuss what types of struggle for existence you may find there.

4.5. what is the need of conservation in in today's world ? you have recently visited a sanctuary Write two characteristic features you find typical to it.             3+2= 5
OR
you live near the airport area. Deduce what pollution you face every day and what are its effect on your body.

4.6. what criteria should you take in to account to declare a place a hotspot ? you have been invited to deliver a speech in an awareness programme on Lung cancer. Discuss what you must include in your speech.     3+2= 5
OR
list up the reasons behind the reduction in number of tigers in a forest. what steps should you take to overcome this?

BIOLOGY (SHORT QUESTIONS)

Odd one out

1) adrenal, liver, thyroid, pituitary

2) coughing, sneezing, eating, blinking

3) corpus luteum, corpus callosum, pons, Cerebellum

4) sulphur dioxide, carbon monoxide, oxygen, Nitrogen dioxide 

5) thyroid gland, adrenal gland, pituitary gland, prostate gland.

6) cretinism, myxedema, goitre, scurvy.

7) insulin, glucagon, diabetes insipidus., diabetes mellitus 

8) calyx, corolla, style., androcium

9) insulin, blood sugar., adrenaline, thyroxin 

10) oestrogen, Progesterone, testosterone, prolactin.

11) Cerebrum, cranium., Cerebellum, pons

12) cell wall, plastids, large vacuole, centrosome.

13) cortex, pelvis, retina., medulla

14) ovary, fallopian tube, ureter., uterus

15) Myopia, hypermetropia, xerophthamia., astigmatism

16) thyroid gland, adrenal gland, pituitary gland, prostate gland.

17) cretinism, myxedema, goitre, scurvy.

18) insulin, glucagon, diabetes insipidus., diabetes mellitus.

19) pons, Cerebellum, medulla oblongota, Cerebrum.

Match the column of the following:

1)

Column A

A) liver

B) ova

C) cochlea

D) vein

E) neuron

F) stomata

G) grana

Column B

a) basic unit of the brain

b) stimulated by light

c) deoxygenated blood

d) part of the sclera

e) haploid cell

f) blind sacs

g) found in the kidney

h) audio receptors

i) diffusion of gases

j) breakdown of proteins

k) diploid cell

2) Column A

A) chromosomes become arranged in a horizontal plane at the equator

B) daughter chromosomes move to opposite poles of the spindle

C) chromosomes become visible as fine, long threads

D) chromosomes lose their distinctiveness and gradually become transformed into chromatin network.

Column B

a) Anaphase

b) Prophase

c) Telephase

d) Metaphase

3) Given below a set of  biological terms. Of these paired into  matching pairs.

Cell wall, Deoxy ribonucleic acid, neurotransmitter, spinal cord, cellulose, chromosome, adenosine triphosphate, neuron, energy molecule, acetylcholine, kidney, 

4) column A

A) birth rate

B) demography

C) population density

D) tubectomy

E) death rate

F) population explosion

G) immigration

H) growth rate

Column B

a) the addition of new individuals of the population from other localities

b) natality

c) the high rate of growth of human population

d) the excess of births over deaths in a year per thousand population

e) mortality

f) population dynamics

g) cutting and ligaturing the oviduct of both sides

h) the size of a population in relation to per unit area at a given time.

5) column A

A) The blind spot

B) the yellow spot

C) the stroma

D) the grana

E) cretinism

F) myxoedema

G) afferent neuron

H) mortality

Column B

a) carries impulses away from the brain and spinal cord

b) carries impulses towards the brain and spinal cord

c) is the place for aerobic respiration

d) is the place for dark reaction of photosynthesis

e) is the place through which transpiration takes place

f) is the place for light reaction of photosynthesis

g) is the number of deaths in a specified period of time

h) is the number of live births in a specified period of time

i) is free of rod cells

j) is the exact centre of the posterior portion of the retina

k) is a condition due to undersecretion of thyroxin in an adult

l) is a condition due to lack of thyroxin in a child.

Difference between:

1) artery/vein

2) serum/vaccine

3) photosynthesis/respiration

4) yellow spot/blind spot

5) blood plasma/serum

6) catabolism/anabolism

7) sperm/Ovum

8) hormone/enzyme

9) nervous system/hormonal system

10) vasectomy/tubectomy

11) castration/ovariectomy

12) emigration/immigration

13) homozygous/heterozygous

14) dominant/recessive genes

15) phenotype/genotype

16) heredity/genetics 

17) sensory/motor neurone (function)

18) blood/lymph (composition)

19) ureter/urethra (function)

20) osmosis/diffusion (flow of solvent molecules)

21) myopia/hypermetropia (cause of the defect)

22) Glycolysis/Kreb's cycle (reaction site of the process in a cell)

23) artery/vein (direction of blood flow)

24) Cerebrum/Cerebellum

25) red blood corpuscle/white blood corpuscle

Fill in the blanks:

1) insulin is produced in ___

Islets of Langerhans of pancreas (Beta cells)

2) lack of iodine in diet causes ___

Goitre

3) ___ is produced by inner medullary part of adrenal gland.

Adrenaline

4) in adult deficiency in secretion of thyroid produces a disease called ___

Myxedema

5) insulin makes the liver turn blood sugar into ___

Glycog6

6) the gland which secrets thyroxin is called ___

Thyroid gland

7) the endocrine parts of the pancreas is___

Islets of Langerhans

8) nervous system and ___ are very close related.

Endocrine system.

9) The sign of family planning and family welfare in India ___

Inverted red triangle

10) The surgical removal of testes is known ____

Castration

11) The population of whole of Asia beyond 2001 AD is expected to be ____

13 billion

12) total population in India in 1999 was____

100 millions

13) world population in 1994 was____

 5. 6 billion

14) prevention of fertilization is done by using______

Contraceptive

15) number of deaths per 1000 of population in one year is called ___

Death rate

16) The study of population in a statistical method is known as ___

Demography 

17) fill the blanks with following words (Osmosis, Ciliary muscles, aorta, stapes, alveoli, WHO, malleus, diffusion, dorsal aorta, bronchioles, iris, red cross

 a) The part of the eye responsible for change in the size of the pupil is the____

Ciliary muscles

b) The process by which molecules distribute themselves evenly within the space they occupy is termed ___

Diffusion

c) The blood vessel leaving the left ventricle of the mammalian heart is the ____

Dorsal aorta

d) The ear ossicles in contact with the oval window of the inner ear is the ____

Malleus 

18) The gaseous pollutant which causes acid rain is ___(carbon monoxide, carbon dioxide, nitrogen dioxide).

19) The valve present between the left atrium and the left ventricle is the ____(Tricuspid valve, biscuspid valve, semilunar valve)

20) The blood vessel supplying blood to the kidney ___(renal vein, renal artery, dorsal aorta)

Choose the correct answer to the following:

1) Cerebellum is the part of the brain which is responsible for:

A) Interpreting sensations

B) conducting reflexes in the body

C) maintaining posture and equilibrium.

D) controlling thinking, memory and reasoning

2) The mineral elements essential for the clotting of blood is:

A) iron B) calcium. C) iodine D) sulphur

3) A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis to:

A) remove chlorophyll from the leaves

B) remove starch from the plant

C) ensure that no photosynthesis occurs.

D) ensure that the leaves are free from starch.

4) The part of the human ear concerned with hearing are:

A) cochlea, ear ossicles and tympanum.

B) semicircular canals, utricules and saccules

C) eustachian tube, tympanum and utricules

D) perilymph, ear ossicles and semicircular canals 

5) Marine fish when thrown under tap water bursts because of:

A) endosmosis. B) Exosmosis C) diffusion D) plasmolysis 

6) Duplicated chromosomes are joined at a point termed

A) centrosome B) centromere. C) centriole D) Chromatid

7) Osmosis involves diffusion of:

A) suspended particles from lower to higher concentration

B) suspended particles from higher to lower concentration

C) water from the more concentrated solution to the less concentrated solution

D) water from the less concentrated solution to the more concentrated solution.

8) Transpiration pull will be maximum under which of the following conditions:

A) open stomata, dry atmosphere and moist soil

B) open stomata, high humid atmosphere and well irrigated soil

C) open stomata, high humid atmosphere and dry soil

D) closed stomata, dry atmosphere and dry soil.

9) Which one of these reactions occur during photosynthesis:

A) carbon dioxide is reduced and water is Oxidised

B) water is reduced and carbon dioxide is Oxidised.

C) carbon dioxide and water are both Oxidised

D) carbon dioxide and water are reduced 

10) excretion commonly involves:

A) removal of all by products during catabolism

B) removal of all by products during anabolism

C) removal of nitrogenous waste.

D) all of the above 

11) In mammals, the corpus callosum connects:

A) the two optic lobes

B) the two cerebral hemispheres.

C) the Cerebrum of the Cerebellum

D) the pons to the medulla oblongota 

12) Which one of the following is the route that a sperm follows when it leaves the testis of a mammal:

A) vas deferns--> epididymis --> urethra

B) urethra --> epididymis --> vas deferns-->

C) epididymis --> urethra--> vas deferns

D) epididymis --> vas deferns--> urethra.

13) The space between the cell wall and plasma membrane in a plasmolysed cell is filled with:

A) isotonic solution

B) hypotonic solution

C) hypertonic solution.

D) water

14) which of the following glands has both endocrine and exocrine functions:

A) pituitary gland

B) thyroid gland

C) pancreas gland.

D) adrenal gland 

15) The specific function of light energy in the process of photosynthesis is to:

A) reduce carbon dioxide

B) synthesize glucose

C) activate chlorophyll

D) split water

16) Agranulocytes are:

A) lymphocytes, monocytes

B) lymphocytes, basophils

C) eosinophils, basophils

D eosinophils, monocytes

17) column A

A( Bowman's capsule

B) dendrons

C) acrosome

D) iris

E) ovulation

F) pacemaker

G) pleura

H) nephron

Column B

a) spermatozoa

b) kidney tubules

c) S. A. Node

d) A. V. Node

e) glomerular filtration

f) lungs

g) nerve impulse

h) testis

I) colour of eye

j) oxytocin

k) luteinising hormone

l) Progesterone

Give the technical terms:

1) loss of water in the form of water droplets from the margin of leaves.

2) A statistical study of the human population of a region.

3) movement of WBC 's out of capillary walls at the site of the injury.

4) the period of intrauterine development of the embryo.

5) a colourless plastid in the cytoplasm of plant cells around which starch collects.

6) Protein produced in the blood to fight and destroy harmful microbes

7) the phase of contradiction of the chamber of the heart 

8) The onset of reproductive phase in a young female.

9) rupture of follicle and release of ovum from the ovary.

10) monthly discharge of blood and disintegrated tissue in human female.

11) process of fusion of ovum and sperm.

12) fixing of developing zygote (blastocyst) on the uterine wall.

13) gland which produces hormones.

14) The number of person per square kilometre at any one given time.

15) A membrane that surrounds the foetus and secrets a protective fluid.

16) protective coverings of the brain and spinal cord

17) A statistical study of human population.

18) The inward movement of solvent molecules through the plasma membrane of a cell

19) loss of water in the form of droplets from the margin of a leaf.

20) Adjustment of the eye in order to obtain a clear vision of objects at different distances.

21) The inset of reproductive phase in a young female.

22) Rupture of follicle and release of ovum from the ovary.

23) monthly discharge of blood and disintegrated tissue in human female.

24) process of fusion of ovum and sperm.

25) fixing of developing zygote on the uterine wall.

True/false

1) pregnancy in women can be prevented by the method of vasectomy

2) cones are the receptor cells in the retina of the eye sensitive to dim light.

3) The unit of light absorbed by the chlorophyll during photosynthesis is the proton.

4) the part of the ear associated with balance is the cochlea.

5) Deafness is caused due to the rupturing of the pinna

6) cells that have lost their water contents are said to be Deplasmolysed. 

7) photosynthesis results in loss of the dry weight of the plant.

8) Xylem is the water conducting tissue in plants

Name the following:

1) A substance that initiates an immune response.

2) The structure in which the testes are present in a man.

3) The valves present in between the Chambers of the right side of the human heart.

4) Condition of a cell placed in a hypotonic solution.

5) A pollutant largely responsible for Acid Rain.

6) The part of the human brain that controls body temperature.

7) The genetic constitution of an organism.

8) the part of the eye responsible for its shapes.

9) the part of the chloroplast where the dark reaction of photosynthesis takes place.

10) Structure which is responsible for the production of ovum.

11) The fusion of male and female gametes.

12) The place where embryo develops.

13) The male reproductive cells of a mammals.

14) A pollutant which reduces the oxygen carrying capacity of blood.

15) The elements required for clotting blood in man

16) The tube that leads from the ovary to the uterus.

17) Opening found on the undersurface of dorsoventral leaves

18) Tissue concerned with upward conduction of water in plants.

19) Condition of cell which the cell contents are shrunken.

20) The duct which transports urine from the kidney to the urinary bladder.

21) The endocrine gland which produces emergency hormone.

22) The fluid that is present inside and outside the brain.

23) The opening through which light enters the eyes.

24) Opening on the stem through which transpiration occurs.

25) The organ in man concerned with maintaining water balance in the body.

26) The photosensitive pigment present in the 'rod' cells in the retina.

27) The soluble protein present in blood plasma responsible for clotting.

28) The part of the female reproductive system where fertilization- takes place.

29) The process by which leucocytes engulf and destroy bacteria.

30) Respiratory opening found on stems of woody plants.

31) The process by which plants lose water in the form of droplets.

32) plants that prepare their own food from basic raw materials.

33) The organ which produces urea.

34) The iron containing pigment in Erythrocytes.

35) The junction between two nerve cells.

36) An apparatus to compare the rate of transpiration in cut shoots.

37) The pressure exerted by cell contents on a plant cell wall.

38) The fluid surrounding the developing embryo.

39) The outer part of the kidney containing the Bowman's capsules.

40) The plastid found in the cells of yellow petals.

41) The scientific study of human population.

42) The hormone secreted by beta cells of islets of Langerhans.

43) The energy currency of a cell.

44) The part of the brain which is concerned with memory.

45) A cell organelle is found only in animal cell but absent in plant cell.

46) Shrinkage of protoplasm of a living cell when it is kept in a strong solution.

47) The permanent surgical method of family planning in male.

48) The hormone secreted by pituitary gland which controls the urine formation.

49) The structure where fertilization takes place in female reproductive organs

50) The cells surrounding the stomata.

51) The plasma part from where fibrinogen is removed.

52) The process by which water comes out as water drops along the margin of the leaf.

53) The process by which exchange of genetical material takes place between homologous chromosomes.

54) The unit of nervous action in human body.

55) The pigments present in the rods of retina.

56) The part of the brain which is responsible for the balancing the body.

57) The apparatus by which blood pressure is measured.

58) The substance present inside the vitreous chamber of the eye.

59) medical termination of pregnancy.

60) The gland which is present at the base of eyelash.

61) The conditions caused due to the undersecretion of thyroxin in the adult.

62) The chemical used to reduce the rate of transpiration.

63) The layer of atmosphere which protects us from ultraviolet rays.

64) The duration between the fertilization and child birt.

65) The cells in the testis which produce male sex hormones.

66) The part of the plant cell where food material is reserved.

67) The plants which prepare their own food from the basic raw material.

68) The vein in the human body which carries oxygenated blood.

69) Increase in global temperature due to raise in Carbon dioxide concentration in the atmosphere.

70) A complex nucleic acid molecule found in the chromosome of all organisms which act as a primary genetical material.

71) The tube that carries the egg to the uterus.

72) The type of nuclear division by which two daughter cells are produced from one parent cell with no change in chromosome number.

73) The phase of the cardiac cycle in which auricles contract.

74) The junction between the two nerve cells.

75) The duration between fertilization and the child birth.

76) The splitting of water molecule into two component ions by light.

77) The structure which equalizers the pressure on both sides of the ear drum.

77) The structure which holds the flaps of valve in position and prevents their over turning into auricles of hearts.

79) The part of the nervous system which responds to the reflex action.

80) The organ which produces urea.

81) The photoreceptor found in the retina

82) One organ which has got both endocrine and exocrine gland.

83) Number of sex chromosomes in human being.

84) Chemical composition of genes.

85) Gaseous pollutant which causes acid rain.

Continue....