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?