W. B- X (PHYSICAL SCIENCE) TEST PAPER 2024/25

TEST PAPER -1.   (Marks=20)    Time- 30 mins

1) Choose the Correct Option (any two) (1 x2= 2)

a) Which of these is not a fossil fuel ?

i) coal ii) diesel  iii) solar energy iv) petrol

b) Main component of biogas is

i)!methane ii) hydrogen iii) oxygen iv) Acetylene

c) Which type of natural coal has highest calorific value ?

i) Peat b) bituminous c) anthracite d) ignite

2) Fill in the blanks (any two) (1 x 2= 2)

a) formula of methane hydrate us_____

b) jet planes passes through______

c) Ozone gas prevents_____ rays of the Sun to reach Earth's surface.

3) True or False (any two) (1 x2= 2)

a) Main green house gas is methane.

b) Van Allen radiation belt is observed in mesosphere.

c) Methane hydrate mines are located below the Earth surface at the bottom of the sea.

4) Match the columns         

 a) Northern lights  i) gasoline 

b) greenhouse effect  ii) non renewable energy

c) fossil fuel        iii)  thermosphere 

d) geothermal energy  iv) global warming

5) Answer any 6 (1 x 6= 6)

a) Which is the main greenhouse gas.

b) Write one harmful effect of rising temperature of Earth.

c) Name an energy source used for sustainable development.

d) Write the SI unit of the calorific value of fuels.

e) Which layer of atmosphere has an northern lights ?

f) How ozone layer is formed?

g) Name four fossil fuels.

6) Answer any two (2 x 2= 4)

a) Which layer of atmosphere has highest pressure. Give reason ?

b) Write two possibile effects of global warming on future generations.

c) Describe the steps to be taken to reduce greenhouse gas expulsion.

W. B Class VIII- Test Paper

                  

TEST PAPER - 1 (Marks - 15)  Time: 30 mins.

1) Fill in the blanks (any two) (1 x 2)= 2

a) Density of a concentrated saline water is ___then that of ordinary water.

b) Frictional force does not depend on the ____ of surfacing in contact with another surface.

c) 9.8 Newton= _____ kg weight.

2) True or false (any two)   (1 x2= 2)

a) Pressure is the force applied per unit area of the surface.

b) Static friction is smaller than the sliding friction.

c) SI unit of force is Newton.

3) Match the columns: (1 x 4= 4)

Column -A.              Column -B

a) 1 litre of water    i) 1 g/cm³

b) density of water ii) 1 kg

c) mass of cc of water iii) 1000 g

d) 1 kg of water        iv) 1 g

4) Answer the following: (Any two ) ( 1 x 2= 2)

a) Name the instrument is used to measure the weight of an object.

b) Name the instrument is used to measure the air pressure.

c) How do you measure force?

5) Answer any one (2 x 1= 2)

a) State Archimedes principle

Or

State Newton's law of motion

6) Solve the numerical (any two) (1.5 x 2= 3)

a) A body of mass 200g is moving with a velocity of 10cm/s. Calculate the force required to stop it in 10 seconds.

b) A force of magnitude 15N is acting on an object of mass 10 kg. What will be the magnitude of acceleration of the object produced by the force ?

c) A tumbler contents 5 kg of water. The area of the base of the tumblr is 0.2 square metre. What is the pressure applied by the water on the base of the Tumbler.

ICSE - PHYSICS (TEST PAPER) (VIII)

1) Fill in the blanks: (any 8).      (1 x8=8)

a) In charging by induction method, the charge acquired by the neutral object is said to be _____charge.

b) The amplitude of the harmonics will always be____ then the amplitude of the fundamental.

c) The SI unit of coefficient of thermal expansion is_____ .

d) When the object is at infinity, its image is formed at the ____of the concave mirror.

e) ______of a sound depends on the amplitude of the wave.

f) A water droplet is optically ____then air around it.

g) 1 kgf m= ______

h) The atmospheric pressure _____with altitude.

i) The mass per unit volume is termed as______ .

j) Solids have the____ intermolecular space of all the states of matter.

2) State whether the following statements are true or false. Correct the false statements.   (Answer any 8).   (1 x8=8)

a) An electroscopes gives information about the electrons only.

b) Sound propagates only in front direction of the source.

c) Railway tracks expand in winters and contract in summers.

d) A convex mirror always forms a magnified image behind the mirror.

e) Eoller coaster ride is an example of energy transformation.

f) The frequency of a buzzing mosquito is lesser than the roaring of a lion.

g) The blood in our body has the same pressure as atmospheric pressure.

h) For determining the relative density of a liquid, Eureka Can is used.

i) When the heat is supplied to the matter, its a molecules gain energy and start  vibrating vigorously.

3) Choose the correct option (Answer any 8)    (1 x8=8)

a) Conductors have___

i) no free electrons 

ii) a few number of electrons.

iii) a large number of free protons.

iv) a large number of free electrons.

b) Timber is the other name used for ____

i) loudness  ii) pitch iii) frequency iv) quality

c) Which of the following produces a cooling effect ?

i) evaporation ii) condensation iii) fusion iv) deposition

d) The image found by a convex mirror is always____

i) virtual and erect  ii) real and inverted iii) virtual and inverted iv) real and erect

e) In a dry cell , the____ energy gets converted into ____energy.

i) chemical,electrical 

ii) electrical, light 

iii) electrical, chemical 

iv) light, electrical

f) Which of these is not true about a thundercloud ?

i) Charges within a thundercloud get separated due to water vapour.

ii) A thundercloud carries static charges.

iii) The upper part of the cloud carries positive charges.

iv) The lower part of the cloud carries negative charges.

g) The pressure exerted by a liquid on the walls of the container is called ___

i) upthrust  ii) atmospheric pressure iii) lateral pressure iv) surface tension

h) Relative density is also termed as ____

i) specific density ii) specific mass iii) specific gravity iv) specific weight

i) On cooling down a substance, there is a loss of heat and the kinetic energy of its molecules.

i) increases  ii) decreases iii) remains the same iv) none of these

4) Match the columns. (1 x8=8)

a) Earth wire

b) Shrill sound 

c) deposition 

d) kinetic energy

e) energy transformation 

f) pycnometer

g) sublimation 

h) live wire

i) earth wire

a) Green 

b) High frequency

c) Low frequency 

d) Snow formation

e) Change in volume on heating 

f) Moving wind 

g) Specific gravity bottle 

h) Dry ice

i) Brown

j) Green

j) White 

5) DEFINE: (Answer any 8).  (1 x8=8)

1) Electrostatic force

2) Electroscope

3) Oscillation

4) Thermal expansion

5) Lateral displacement.

6) focal length

7) mechanical energy

8) Thrust

9) Density

10) force of cohesion 

6) Difference between the following: (any five):    (2 x5=10)

a) work/power

b) conductor/insulator

c) Loudness/ pitch

d) floating/ sinking

e) fusion/ solidification

f) music/noise

7) Reason behind the following:(any 5).     (2 x5=10)

a) The sounds produced by a piano and a Guitar are different.

b) A normal glass tumbler cracks when dipped in boiling water.

c) Concave mirrors are used as shaving mirrors.

d) The power of an air conditioner is greater than a fan.

e) A sledge is used in snow covered areas.

f) The solids have the highest density.

g) Why do we smell hot food from a distance.

8) Numerical Questions: (any two).     (2.5 x2= 5)

a) A car has a kinetic energy of 2000 J. What will be its kinetic energy if speed is doubled?

b) A vacuum cleaner is rated at 650 watt. How much electrical energy will it consume in 13 days if it is used for 1.5 hours daily.

c) A worker does 150 j of work by dragging a sack of cement with the force of 60 N. Find the displacement of the sack.

9

SCIENCE TEST PAPER - 1 CBSCE

1) Fill in the blanks: (Any ten):         (1 x 10)= 10

a) silver discovered by_______ .

b) endocrine glands are______.

c) The _____forest is the home of the Asiatic lion in India.

d) An ideal fuel has a ____calorific value.

e) We cannot hear the sound above____Hz, and they are called ____ .

f) The image of an object in the eye is formed on the ____ .

g) The atmospheric pressure supports approximately____mm of a Mercury column

h) The intensity of the earthquake is measured on the ____scale.

i) Sound can be produced by _____and it cannot travel in ____ .

j) Hormones are secreted directly into the______ .

k) The earth pulls all objects towards itself. This pull is called___.

2) Name the following: (Answer any eight):    (1 x 8)= 8

a) Name the structure which helps in photosynthesis.

b) The disease caused due to iodine deficiency resulting in thyroxine deficiency.

c) Two vulnerable species in India.

d) Name the hottest part in the flame of the candle.

e) name the unit in which the calorific value of a fuel is expressed.

f) The maximum displacement of the vibrating body on any one side of the mean position.

g) The condition of eye when the lens becomes opaque and cloudy and the vision is impaired.

h) Name the instrument used to measure the air pressure.

i) Name the instrument by which earthquakes are recorded.

j) Science of studying earthquakes is called?

3) Choose the correct option/s in each: (Answer any 7)   (1 x7)= 7

a) Vacuoles in plant cells 

i) produce energy for the cell 

ii) help in the removal of water 

iii) protect the cell   iv) store food

b) Development of the foetus in human females takes place in the

i) ovary ii) uterus iii) oviduct iv) placenta

c) The animals living natural in a particular habitats are called

i) flora      ii) endangered species  

iii) fauna  iv) endemic species

d) This zone is also called the zone of combusion

i) the thin outer zone 

ii) The luminous middle zone 

iii) the dark innermost zone

iv) the blue bottom zone

e) Musical instruments can be played at different pitches by changing the ___of its string.

i) length  ii) tightness iii) thickness  iv) all the above

f) Which instrument is based on the principle of multiple reflection ?

i) telescope  ii) microscope  iii) kaleidoscope iv) all of these

g) What is the sum of all forces acting on a body called ?

i) Balanced force  ii) gravity  iii) speed iv) resultant force

h) Some of the areas in India which are earthquake prone are 

i) North-east b) Rajasthan iii) parts of Gujarat iv) all the above 

4) Change one word to make the sentence true: (Answer any five):  (1 x5)= 5

a) The smallest cell in the human body is the nerve cell.

b) Pancreas is present at the base of the brain.

c) A combustible substance always is a fuel.

d) The sound of the drum has a lower frequency than the sound of violin.

e) Choroid is the responsible for the colour of the eye ?

f) The atmospheric pressure on the top of Mount Everest is less than atmospheric pressure at sea level in Mumbai.

5) Difference between: (Any five):    (2 x5)= 10

a) prokaryotes/eukaryotes

b) Sexual reproduction/ asexual reproduction.

c) Hunting/ Poaching.

d) Gaseous fuels/ Solid fuels.

e) Infrasonic/ Ultrasonic sound

f) yellow spot/ blind spot

6) Write the function of the following:(Answer any two):   (2.5 x2)= 5

a) Chloroplast in a plant.

b) Red Data Book.

c) aqueous and vitreous humour.

7)  Define the followings: (Any three)    (2 x3)= 6

a) Fertilization.

b) Biodiversity.

c) spectrum.

d) resultant force.

8) Reason behind Questions: (Any four)   (2 x4)= 8

a) Why sodium is kept under the kerosene oil ?

b) The loudness of a lion's roar is much greater than a bird's chirp ?

c) Why vision in a human eye gets hampered due to cataract?

d) Why does body weight less on the moon ?

e) Why is a cell called the basic structural unit of life?

9) Write the function of : (any one):     (1 x 2)= 2

a) Iris in a human eye.

b) Nucleus.

10) Answer the following: (Any three) :      (2 x2)= 4

a) What are the conditions necessary for combustion.

b) What is the SI unit of frequency.

c) What are the basic properties of charge?

d) What is the similarity between electrostatic and magnetic force.

Answer any five :        (2 x5)= 10

11) Write the laws of Reflection.       (2)

12) When a glass rod is rubbed with silk, the glass rod gets positive charge, why ?    (2)

13) What causes friction?     (2)

14)a) How is hypermetropia corrected ?    (2)

b) A body vibrates 12 times in 4 seconds. What is the frequency of vibration ?   (2)

15) What is the cell wall in plant cells made of and what is its function?    (2)

16) Match the Following:       (5)

i) butterfly

ii) supporter of combustion       

iii) monometer

iv) presence of charge           

v) cellulose       

    

a) Complex carbohydrates

b) Electroscope 

c) metamorphosis 

d) Oxygen 

e) fluid 

f) microscope

g) specimens 

 

CHEMISTRY TEST (VIII)

1) Fill in the blanks: (Answer all the questions)            (1 x 10)=10

a) The molecules of the solid can just ____about their main positions.

b) Lead nitrate crystal on heating strongly leave behind a solid residue, which is in___ colour.

c) When carbon dioxide gas is passed in excess to through lime water, the lime water initially turns milky and then forms a _____solution.

d) The weight of diamond is measured in_____ .

e) The size of the particles of solute is in between 10⁻⁷ cm and⁻⁵ cm in a_____ .

f) The solute should be____ in the solvent for the quick formation of solution.

g) Hydrogen reacts with chlorine to form _____gas.

h) When steam is passed over heated a magnesium powder, it forms___ and hydrogen gas.

i) Chemical compound is always electrically______ .

j) The valency of an element X with atomic number 12 is _____ .

2) Write true or false for the following: (Answer any five)     (1 x 5)=5

a) Carbon dioxide has a sour taste.

b) Zinc is found in traces in all plants and animals and hence is an organogen.

c) The process involving the disappearance of solid (solute) in water is called solution.

d) Magnesium reacts with caustic soda solution in liberate hydrogen gas.

e) The reaction between quicklime and water is an endothermic reaction.

f) Nuclear radiation under medical supervision can cure cancer.

3) Statements given below are incorrect. Write the correct statements: (Answer any seven).          (1 x 7)= 7

a) The electronic configuration of ³⁹₁₉K is 2,9,8.

b) A compound can be synthesised from its constituent elements by proper physical method.

c) The decomposition of ammonium chloride into ammonia and oxygen is an exothermic reaction.

d) When concentration of salt reaches 35 g per litre of sea water, the concentration starts increasing rapidly.

e) In Buckministerfullerene , each molecule has 60 atoms arranged in rectangles and triangles.

f) In limited supply of air charcoal burns to form carbon dioxide gas.

g) Gas carbon is gaseous form of carbon.

h) The molecules of a gas generally move in any one direction.

4) Tick(√) the most appropriate answer:  (Answer any 8)      (1x 8)= 8

a) water gas is a combination of

i) CO₂ and H₂O ii) NO₂ and H₂O iii) NO and H₂O iv) CO and H₂

b) The process by which ferric oxide changes to iron when heated with charcoal powder is called 

i) oxidation  ii) reduction iii) dehydration iv) decomposition

c) The property due to which, the gases and the liquids accumulate on the outer surface of solid is called:

i) adhesion ii) cohesion iii) adsorption iv) absorption

d) Which of the following is homogeneous in nature ?

i) solution ii) suspension iii) colloidal solution  iv) both (i) and (ii)

e) In which of the following the particles of solute can be separated by the process of filtration ?

i) solution  ii) colloid ii) suspension iv) all of these

f) Hydrogen reacts with lead oxide (heated) to form:

i) lead hydrides and water  in) lead and water iii) lead hydroxide and water iv) lead hydroxide only

g) The substance/s which contain hydrogen in combines state is:

i) carbohydrates  ii) fats iii) proteins  iv) all of these

h) Which one is monovalent ?

i) potassium ii) iron III) sodium iv) both (i) and (ii)

i) When steam is passed over white hot charcoal, it forms.

i) carbon dioxide gas only

ii) carbon dioxide gas and hydrogen gas.

iii) carbon monoxide gas and hydrogen gas.

iv) methane gas and carbon dioxide gas.

5) Name the following: (Answer any ten).         (1 x 10) = 10

a) Various physical forms of an element which have the same chemical properties.

b) The fermentation of a vegetable material in the absence of air is brought about by.

c) The substances which absorb moisture from air, but do not change their state.

d) The process of converting liquid vegetable oil into vanspati ghee by the passage of hydrogen, in the presence of nickel.

e) An oxide formed when a non metal reacts with oxygen.

f) The force of attraction between two similar or different atoms in a molecule.

g) The initial energy used in heating of magnesium called..

h) The intermolecular force acting between same kind of molecules.

i) The process by coke is prepared.

j) A chemical reaction in which more reactive element displaces a less reactive element from its aqueous salt solution.

6) Define the followings: (Answer any 5).       (2x5)= 10

a) Dry ice

b) Water of crystallization

c) Electrolysis of water

d) Valency

e) Nuclear fusion

f) Sedimentation

g) Physical Charge

7) State the difference between the following: (Any five)     (2 x5)=10

a) Mixture/ Compound

b) Deliquescent substances/ Hygroscopic substances

c) Oxidation/ Reduction

d) Endothermic reaction/Exothermic reaction

e) Colloidal solution/ Suspension

f) Cations/Anions

g) Chemical equation/Word equation

8) Balance the following: (Any Two)      (2 x 3)=6

a) Mg+ O₂--> MgO

b) Fe₂O₃ + C ----(heat)--> Fe+ 3CO

c) NaOH + CO₂---> Na₂CO₃+ H₂O.   

d) iron(heated)+ steam --->

9) a) Draw geometric representation of atoms, showing clearly, the number of protons, number of neutrons and the number of electrons in various shells.      (2)

b) Write the chemical formula of the following compounds :   (Any three )  (3)

i) Aluminium phosphate 

ii) potassium chlorate

iii) Sodium carbonate.

iv) Calamine.

c) State your observation when equal volumes of hydrogen and chlorine are exposed to 

i) diffused sunlight 

ii) direct sunlight.                  (2)

d) Name two chemicals which are responsible for temporary hardness of water.

Or

Name two chemicals are responsible for permanent hardness of water.          (2)

e) Draw a neat and fully labelled diagram for the preparation of carbon dioxide gas in laboratory (details of procedure not required).         (5)

Chemistry - 9 ( Incorrect to Correct)

1) As per kinetic theory of matter, particles in matter are stationary.

2) Expansion of substances when heated is an example of a chemical change.

3) Mercury and water form a homogeneous mixture.

4) Methyl alcohol can be separated from methyl alcohol -- water mixture using a separating funnel.

5) The formula of sodium chlorate is NaClO.

6) The valency of sodium in sodium sulphite - Na₂SO₃ is 2+

7) Reaction of silver nitrate with sodium chloride is an example of a displacement reaction.

8) 0°C is equivalent to -273K on the Kelvin scale.

9) As per Charles Law equation P₁V₁ = P₂V₂= K (constant)

10) The component of air which is an essential constitution of plant proteins is oxygen.

11) Oxygen and nitrogen are non supporters of combustion.

12) Percentage of nitrogen in inspired air is more than in respect air.

13) Separation of components of air is possible by preferential liquefaction.

14) Water at 4°C has minimum density and minimum volume.

15) Dissolved air in water contains a lower percentage of O₂ than ordinary air.

16) Sulphide dioxide dissolves in water to give sulphuric acid.

17) A saturated solution cannot dissolve more of the solvent at a given temperature.

18) Solubility of CaSO₄ increases KNO₃ decreases with rise in temperature.

19) A decrease in pressure and temperature causes decrease in solubility of gas in water.

20) Fused calcium chloride is efflorescent and hence used as a desiccating agent.

21) A proton has a positive charge and negligible mass.

22) Mass number of an element is the sum number of electrons and protons in the atom.

23) An element X having electronic configuration 2,8,2, has a valency of -2.

24) Isotopes have the same number of protons and electrons but in electronic configuration.

25) A covalent bond is formed by electron sharing between a metallic and a non metallic element.

26) The first element of the periodic table doesn't contain any protons.

27) In a compound having the formula H₂Z, the valency of Z is+1.

28) Li(at. no. 7), Na(at. no. 23), and K(at. no.39) represented Dobereiner Law of Octaves.

29) Mendeleef arranged elements in seven horizontal rows and eighteen vertical columns.

30) Isotopes having different atomic weights had the same position in Mandeleef's table.

31) The number of valence electrons represent the period number of the periodic table.

32) Elements of group IA, VIIA and zero are highly reactive.

33) All alkali metal are electronegative and lose electrons forming anions.

34) Hydrogen is a non and forms electrovalent compound only with metals.

35) Zinc, iron and lead react with dilute sulphuric acid liberating hydrogen.

36) Hydrogen is lighter than air, fairly soluble in water and easy to liquefy.

37) Hydrogen removes oxygen from heated metallic oxides and is itself reduced to water.

38) Carbon atomic no.6 has six valence electrons and placed in group VIA of the periodic table.

39) Carbon is the only element of its group exhibiting allotropy.

40) Graphite and lampblack are micro- crystalline allotropes of carbon.

41) Destructive distillation of wood gives wood tar as the only liquid product.

42) Passage of steam over heated coke results in formation of producer gas.

43) Nitrogen, phosphorus and sulphur are group VA elements.

44) Ammonium nitrate decomposed to give water and nitrogen.

45) Nitrogen is highly reactive due to presence of a strong triple covalent bond.

46) Nitrosifying bacteria convert nitrates to free nitrogen in the atmosphere.

47) Oxygen (at no 8) and sulphur (at no 16) are elements of the same group and period.

48) Lower oxides of lead decompose to give a higher oxide and oxygen.

49) Rusting is slow reduction of iron its oxide -- hydrated iron (III) oxide.

50) Extraction of sulphur of higher purity is obtained by the Sicilian Process.

51) Metals react with sulphur only in the heated state.

52) Elements of group VIIA and VIA are all nonmetals.

53) Chlorine oxidised hydrogen Sulphide to hydrogen chloride.

54) Chlorine and iodine displaces bromine from potassium bromide.

55) Chlorine bleaces both coarse and delicate fabrics by reduction.

56) CO₂ can be converted to CO by passage over heated copper (II) oxide.

57) Liquid carbon dioxide is called dry ice.

58) Thermal decomposition of limestone is called slaking of lime.

59) Heat on lead(IV) oxide leaves a black residue which fuses with the glass.

60) Temporary and permanent hard water can be softened by boiling.

Short Questions Test(Physics) -1

1) A freely suspended magnet comes to rest along____ in the Earth's magnetic field.

2) The effective length of a magnet is the distance between its____

3) The _____ of magnetic domains in a substance causes magnetisation.

4) Charge on an electron is____

5) Current in a circuit is measured by ____and it is connected in circuit in _____

6) A rheostat is used to_____

7) The SI unit of resistance is_____

8) When a rod is held near the disc of a positively charged gold leaf electroscope, the divergence of leaf increases. The charge on rod is____

9) Two like charges ____and ____attract.

10) A body which does not transmit electric charge from one end to the other is called an____because it has a deficiency of ____, whereas a body that transmits electric charge is called a ____because it has____ free electrons.

11) The fundamental particles of an atoms are (i)_____(ii)____(iii)_____. Out of these particles___ has negative charge,____ has positive charge and ___ is neutral.

12) In a neutral atom, the number of____ is equal to the number of protons.

13) Wave motion involves transport of _____

14) Light waves are___ but sound waves are ____

15) In a transverse mechanical wave, the particles of the medium vibrate in a direction _____.

16) In a longitudinal mechanical wave, the particles of the medium vibrate in a direction _____.

17) At crest, the displacement is ____and at troughs , the displacement is ____.

18) There is no pressure variation in____ wave.

19) Sound waves cannot travel through____but require a _____.

20) Sound is produced due to the_____ in the medium.

21)! Wavelength × frequency= _____

22) Velocity of sound increases by ms⁻¹ for each degree Celsius ____in temperature.

23) The SI unit of frequency is ______.

24) The image formed by the convex mirror is always _____.

25) the image formed by a concave mirror can be____ or_____.

26) The radius of curvature of a spherical mirror is____ of its focal length.

27) A shaving mirror is _____and rear view mirror in automobiles is_____.

28) The image formed by a plane mirror is of same size, erect and____.

29) If the angle between two plane mirror is 50°, the number of images for a point object in between them is_______.

30) In a Periscope, two plane mirrors are placed______to each other.

31) light is a form of____and it travels in air with a speed of _____

32) In the process of conduction, the molecules_____ their position.

33) Heat is transferred ____by a convection current.

34) Water is a _____conductor of heat.

35) Good absorbers are_____radiators( or Emmmitors) of heat.

36) highly polished surfaces are____ reflectors but____ absorbers.

37) The upper fixed point on the Fahrenheit scale is marked as____

38) A temperature of 50°C corresponds to _____on the Kelvin scale.

39) The lowest possible temperature which can be attained is ___°C.

40) 100° on the Celsius scale corresponds to____° on the Fahrenheit scale.

41) In a clinical thermometer there is a ____in the stem just about the bulb.

42) The distance between the lower fixed point and the upper fixed point is divided into ____ equal parts in the Fahrenheit scale.

43) On Kelvin scale, absolute zero is the temperature at which____ and it corresponds to ____ on the Celsius scale.

44) When a substance is cooled, the average kinetic energy of its molecules___

45) On hurting, the change in length of a rod is directly proportion to____ and____

46) The unit for the coefficient of cubical expansion is_____

47) A device used to control temperature is called____.

48) A given mass of water will have least volume at_____°C.

49) Two rods A and B of same material and  of length 1m and 2m respectively, are heated from 0°C to 100°C. The rod____ elongates more than the rod____.

50) The density of water is maximum at_____°C.

51) α= _____ × β= ______ × γ, where α, β γ, are the co-efficients of linear, superficial and cubical expansion, of a substance respectively.

52) The moment of force=  force × ____

53) The SI unit of the moment of a force is______

54) Force= mass × ____

55) 1 kgf= _____N.

56) The Newton is the unit of____

57) 1 N = 0.1 kg × ____ms⁻².

58) One newton force will produce in a 1 kg mass an acceleration of____.

59) A body is thrown vertically upward with a velocity 1000 m/s. While it returns , the velocity at the starting point will be____.

60) A body is thrown vertically upwards . At the highet point its velocity will be____ and its acceleration will be____.

61) A train travels from a station A to another station B with a velocity of 100 kmph and returns from the station B to station A with a velocity of 80 kmph. Its average velocity for the whole journey is ____ and its average speed is____.

62) 

Short Questions Test - IX - Biology (1)

1) Genes are made up of ____(RNA/DNA/protein).

2) In plant, cell wall is mainly composed of____(chitin/cellulose/protein).

3) Nucleus was discovered by_____( Robert Hooke/ Robert brown/ MJ Scleiden).

4) Fruits is the ripened ____(overy/bud/stamen ).

5) Calyx and Corolla constitute the ____in a flower.(essential whorls/ accessory whorls /receptacle )

6) _____necessary for fertilization.(callyx/bud/ pollution)

7) Modified hairy calyx in sunflower is called _____.(pappus/keel/ray floret)

8) In Ginger, the stem modification called ___is used for vegetative multiplication. ( Tuber/rhizome/bulb)

9) In a bryophyllum, vegetative multiplication takes place by the ___.(leaves/ stem/ root)

10) In rose, vegetative propagation is artificially brought about by____.( root cutting/ stem cutting/ layering )

11) The technique of producing generatically identical individuals from single cell is called ____(cloning/ grafting/ tissue culture)

12) A large number of disease-- free plants can be produced in a very short time using the technique of ____.(micropropagation/ grafting/cutting)

13) A flower having both the reproductive organ is called____.(bisexual/ complete/dioecious )

14) When a flower can be divided to equal halves through one plane only, the flower is said to be____.( actinomorphic/zygomorphic /irregular)

15) A unisexual flower that has only stamens is called ___.(staminate/bicarpellary/syncarpous)

16) Thalamus is the expanded part of ___.(pedicel /filament/ style)

17) Petals and sepals collectively are called as____.(perianth/bisexual/tepal)

18) Cross pollination takes place in all____ plants(monocious/dioecious )

19) Bougainville flowers pollinated by____. (wind/insects/ water)

20) Double fertilization is common in____.( gynosperms/angiosperms)

21) Salvia is a ____flower.(entomophilous/ornithophilous/hydrophilous)

22) After fertilization, the ____becomes the fruit and the ___becomes the seed.(ovule/ovary/integuments)

23) The non-endospermic seeds are also called as ____.(aluminous/excelluminous)

24) The inner layer of the seed coat is called____.(testa/tegman)

25) The plumule of the seed gives rise to_____.(shoot /root)

26) The germination in gram seeds is _____and that a bean seed is____( hypogeal/ epigeal/viviparous)

27) Caruncle is found in the seed of ______.(castor/pea)

28) Germination in Rhizophora is_____.(viviparous /epigeal)

29) The upper part of the embryo axis is called the _____.(radical/plumule/

30) In_____germination, the cotyledons remain under or just on the surface of the soil.(hypogeal/epigeal)

31) Bacteria were first discovered by_____.(Pasteur /Leeuwenhoek/Koch)

32) A cell wall is____in bacteria.( present/absent )

33) Botulism is caused by a species of____.(Clostridium /rhizobium/Acetobacter)

34) Rhizopus is_____ in Nutrition.( saprophytic/ parasitic)

35) short, incomplete, spiral, bacteria are called _____.(Vibrio/spirilla/cocci)

36) Class Amphibia includes____animals,( aquatic/terrestrial/ amphibian)

37) Class mammalia includes animals with ____.(poison/ glands /mammary glands/ parotid glands)

38) Metazoa includes _____animals,(unicellular/bicellular/ multicellular)

39) Insects have ____pairs of legs.(2/3/6)

40) _____of lungs is the volume of air that can be taken in and expelled by maximum insipiration and expiration.(vital capacity/ total lung capacity/ tidal volume )

41) The respiratory centre is located in the____.( cerebrum/ cerebellum/medulla oblongata )

42) Nasal passage is lined by____.( flagella.ciliated epithelium/cilia)

43) Exchange of air takes place between capillaries and ____.(alveoli/ bronchi/trachea)

44) Respiration is a____ process.( physical/chemical/biochemical)

TEST paper - 4(Chemistry) - IX

22) sodium chloride in parts a colour on application of the flame test or identification of the Metallica radical in a salt calcium chloride colour and potassium chloride a colour golden yellow hydrogen sulphide nitrogen dioxide turns lead acetate paper silvery black heat on zinc nitrate lead nitrate copper nitrate gives a black residue a coloured acidic basic neutral gas and colourless two solution is how much heterogeneous in nature average of the atomic weight of its natural molecules ions isotopes all temperature on Kelvin scale are in figures and negative positive - 273 is equals to 273 0 every substance is a stored amount of energy unit potential or latent commonly called mechanical chemical photo chemical chlorine needs to 13 at 10 stable electronic configuration of the nearest noble gas number of electron gain The lost for atom of the metals does not tell about the concentration of both react and products the formula of aluminium sulphide is nitrogen dissociation is reversible reaction in the reaction activityozone layer prepared harmful from reaching the Earth surface will be raise Gamma rays electromagnetic radiation element of 6 electrons in its outermost LC its valency is +2 - 2 + 1 - 1 elements of atoms in which all sales and complete cell which is incomplete bridge normal in a transition in the Bose process for the manufacture of hydrogen the gas carbon dioxide recovered by dissolving it in caustic potash chloride carbon disulphide in the manufacture of hydrogen reaction

TEST PAPER - 3(Chemistry) IX

SELECT - THE CORRECT ANSWER

1) Gram atomic mass is also considered as - gram ____(ion/molecule/atom)

2) Decomposition of ammonium chloride by heat to give ammonia and chlorine is an example of thermal to composition thermal dissociation catalytic reaction the valency of ___(thermal decomposition/ thermal dissociation/ catalytic reaction).

3) The valency of copper in CuCl₂ is ____(1⁺/2⁺/3⁺).

4) The law which relates between the pressure of a gas and the volume occupied by it, temperature remaining constant is _____(Charle's law/ Boyle's law/ Lussac's law).

5) The temperature ____ is called absolute zero. (273K/0°C/ - 273°C).

6) Oxygen in presence of U. V. light gives two ______. This combines with ___ to give ozone. (Oxygen atoms/ oxygen molecule/ two oxygen molecules)

7) Hydrogen and carbon monoxide are example of ____  gases while chlorine and oxygen examples of ____gases. (non-combustible/ combustible )

8) An increase in pressure on the surface of water causes ____ in the solubility of the gas dissolved in water. (increase/decrease/ no change)

9) ____ is an example of an efflorescent salt, while ____an example of a deliquescent salt. (Lead chloride/ washing soda / iron[III] chloride)

10) If an element 'X' has atomic number 18, then valency is____ ( + 1/ - 1/0)

11) The maximum number of electrons in any shell of an atom is represented by 2n². The maximum number of electrons in the M shell is ____(2/32/18/8)

12) Isotopes of chlorine have the same _____but different number of____( atomic number/mass number/ neutrons /protons/electrons )

13) An element 'Y' has atomic number 20. It finds position in period ____(2/3/4) and group ____(1/2/3).

14) The basis of classification of elements by Newlands was based on arrangement of elements in increasing order of ____(atomic number/atomic weights ) in series of ____(6/7/8).

15) The period-1 contains _____elements, and period 2 and 3 ___elements each. There are ____horizontal rows called periods, and _____vertical columns called groups. An element in period 3 will have _____electron shell or orbits and in group VA will have ____ valence electrons in its outermost shell. (2/3/5/7/8/10/18)

16) Period 2 is a ____(short/ long) period containing____( 6/7/8) elements of which, carbon (at. no.6) is placed in group ____(14[IVA]/15[VA]/16[VIA],p),  nitrogen (at. no. 7) is placed in group ____(14/15/16), oxygen(at. no. 8) is placed in group___ (14/ 15 /16/17), sulphur (at. no.16) is placed in group ____(14/ 15/ 16/ 17) and chlorine (at. no. 17) is placed in group ___(14 /15 /16/ 17).

17) On moving from left to right in a period, the number of electron shells ___(remain same/increase by one), the number of valence electrons___( remain same/ increase by one) and the elements show a transition from ____(non metallic to metallic/ metallic to non metallic) character. On moving down a group, the valence electrons ___(remains same/increase by one) and the elements show a transition from ____(non metallic to metallic/metallic to non metallic) character.

18) A non renewable source of energy fuel used instead of fossil fuel to reduce greenhouse gas pollution is ____(hydrogen energy/ biogas/ CNG)

19) From the elements of group 15[VA] ___&___ are nonmetals and highly electronegative. The electronegativity---- on moving down the group and so also the non metallic character. ( nitrogen/ Phosphorus/ arsenic /antimony/increase/decreases)

20)  Hydrogen gas is lighter than air in collected in the laboratory by ____(upward displacement of air/downward displacement of water/downward displacement of air)

21) Sulphur dioxide gas turns potassium permanganate solution from___ to colourless and potassium dichromate from ____ to ____(orange /green/ pink/ blue)

TEST paper - 2(Chemistry) - IX

1) The chemical other than chlorofluorocarbon, responsible for ozone depletion & global warming.

2) An exothermic reaction involving two neutral gaseous reactants .

3) An element which does not lose, gain or share electrons and has two electrons in its valence shell .

4) A non metal in group 17[VIIA] of the periodic table, which is a solid at ordinary temperatures .

5) The salt formed when aluminium reacts with concentric sodium hydroxide solution.

6) The process involving hydrogen used in the manufacture of vegetable fat.

7) The type of oxide formed by the element in period 3 and group 13[IIIA].

8) The valency of calcium in calcium nitride.

9) An element other than hydrogen and chlorine which exists in isotopic form.

10) A lead salt which evolves reddish brown fumes on thermal decomposition.

11) The more electronegative element from the elements oxygen and sulphur present in group 16[VIA].

12) The law which states that the product of volume and pressure of a given mass of a dry gas is constant provided temperature remains constant.

13) The most reactive and the least reactive metal from the metal Na, Al, Cu, Ag.

14) The element in group 17[VIIA] of the periodic table which is a liquid at ordinary temperatures .

15) The period which contains 8 elements including the nonmetal sulphur.

16) The element in group 17 [VIIA] of the periodic table which bleaches vegetables dyes by oxidation.

17) A hectahydrate salt containing iron.

18) The most reactive element in group 16[VIA] of the periodic table.

19) The product obtained when nitrogen reacts with a neutral gas and the reaction is endothermic.

20) A nitride of a divalent metal.

21) The displaced product when zinc reacts with copper sulphate solution.

22) The colourless liquid obtained when the first element of group 14[IVA], reacts with the second element of group 16[VIA] of the periodic table.

23) The least reactive element in group 15[VA] of the periodic table.

24) The oxidation number of nitrogen in - nitric oxide.

25) A soluble salt formed by synthesis, when a trivalent metal, combines with a coloured acidic gas.

26) The salt formed when zinc reacts with caustic potash solution.

27) The law which state that--

a) The product of the volume and the pressure of a given mass of dry gas is constant-- temperature remaining constant.

b) The volume of a given mass of any gas is directly proportional to its absolute temperature -- pressure remaining constant.

c) In a chemical reaction, the total mass of the reacting substances is equal to the total mass of the products-- masses measured under similar conditions.

28) The temperature scale with absolute zero as its starting point .

29) An element which is inactive and present in traces in the atmosphere.

30) A secondary pollutant from the primary pollutant nitric oxide.

31) The gaseous product of boiling a sample of temporary hard water, containing soluble bicarbonates.

32) A a) positive radical b) negative radical -- both containing the element 'H'.

33) A metal which shows variable valency of

a) + 1 & +2 

b) + 2 & +3

c) +2 & +4

34) The source of inorganic material in sewage waste water.

35) A combustible neutral gas which is a non-supporter of combustion.

36) In the reaction - 2KI + H₂O₂ --> WKOH + I₂. Name the oxidising agent & oxidised product.

37) The type of the chemical reactions seen in the chemical change-- Cl₂ + 2KBr --> 2KCl + Br₂.

38) A trivalent metal which reacts with steam laborating hydrogen.

39) The shell or energy level having a maximum of 8 electrons.

40) The atom which needs one electron to attain stable electronic configuration of the nearest noble gas - helium.

 ₂₂₂₂

Test paper - ix Chemistry -1

NAME OR STATE - THE FOLLOWING:

1) The unit in which atomic weight is expressed.

2) The type of bond shared between sodium [²³₁₁Na] & Sulphur [³²₁₆S] during the formation of the compound sodium sulphide.

3) A deliquescent substance also used in the softening of hard water.

4) A liquid oxidising agent and a gaseous reducing agent.

5) A salt or a gas which undergoes a photochemical reaction.

6) The salt formed when zinc reacts with caustic potash.

7) The group number of the element having atomic number 12.

8) The subatomic particle which carries a unit negative charge and has negligible mass.

9) A metal other than iron and copper which shows variable valency.

10) Two neutral gases one of which is oxygen which combines to give a coloured acidics gas.

11) The acid responsible for slight acidity in natural rain water.

12) A gas which is combustible but a non-supporter of combustion.

13) A metal exhibiting valency 2⁺ and 3⁺

14) The gas liberated when ammonium dichromate undergoes thermal decomposition.

15) A gas liberated when ammonium dichromate undergoes thermal decomposition.

16) A gas responsible for melting of ice-caps.

17) A compound which on thermal decomposition, leaves a metallic residue and a gas which relits a glowing splint.

18) The residue left on dehydration of glucose by concentrated of sulphuric acid.

19) A hygroscopic liquid which acts as a drying and a dehydrating agent.

20) The covalent compound which has, two shared pairs of electrons between each of the two atoms.