MULTIPLE CHOICE QUESTIONS
1.Which of the following phenomena would increase on raising the temperature?
( A ) Diffusion, evaporation, compression of gases
( B ) Evaporation, compression of gases, solubility
( C ) Evaporation, diffusion, expansion of gases
( D ) Evaporation, solubility, diffusion, compression of gases
Ans: (c)
2. The amount of heat energy require to change 1 Kg of solid into liquid at its melting point is called
( A ) Kinetic energy
( B ) Condensation
( C ) Latent heat
( D ) direct heat
Ans: (c)
EKUL EDUCATION
CHAPTER-1 | MATTERS IN OUR SURROUNDINGS | MCQ
1.Which of the following phenomena would increase on raising the temperature?
( A ) Diffusion, evaporation, compression of gases
( B ) Evaporation, compression of gases, solubility
( C ) Evaporation, diffusion, expansion of gases
( D ) Evaporation, solubility, diffusion, compression of gases
2. The amount of heat energy require to change 1 Kg of solid into liquid at its melting point is called
( A ) Kinetic energy ( B ) Condensation
( C ) Latent heat ( D ) direct heat
3.The mass per unit volume of a substance is:
( A ) acceleration ( B ) density ( C ) velocity ( D ) weight
4.Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.
( A ) Low temperature, low pressure
( B ) High temperature, low pressure
( C ) Low temperature, high pressure
( D ) High temperature, high pressure
5. On which of the following factors evaporation depends?
( A ) Surface area exposed to atmosphere ( B ) temperature
( C ) humidity and wind speed ( D ) all of the above.
6.The melting point of ice is:
( A ) 273.16 K ( B ) 723.16 K ( C ) 263.16 K ( D ) 373 K
7.The property of flow is unique to fluids. Which one of the following statements is correct?
( A ) Only gases behave like fluids
( B ) Gases and solids behave like fluids
( C ) Gases and liquids behave like fluids
( D ) Only liquids are fluids
8. The process in which change of state from liquid to vapour takes place without the liquid reaching the boiling point is called
( A ) Sublimation ( B ) Condensation
( C ) Evaporation ( D ) Melting point
9.What is dry ice?
( A ) Solid carbon dioxide ( B ) Nitrogen oxide
( C ) Carbon mono oxide ( D ) None of them
10.During summer, water kept in an earthen pot becomes cool because of the phenomenon of
( A ) diffusion ( B ) transpiration ( C ) osmosis ( D ) evaporation
11.Which of the following state is responsible for the glow in the sun and stars?
( A ) Solid ( B ) Liquid ( C ) Plasma ( D ) Gas
12.A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
( A ) Water, air, wind ( B ) Air, sugar, oil
( C ) Oxygen, water, sugar ( D ) Salt, juice, air
13.Which of the following phenomenon takes place when we add a drop of Dettol into the water?
( A ) osmosis ( B ) diffusion ( C ) sublimation( D ) none of them
14.On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be
( A ) 298 K, 311 K and 339 K ( B ) 298 K, 300 K and 338 K
( C ) 273 K, 278 K and 543 K ( D ) 298 K, 310 K and 338 K
15. Every matter has its own……………… and…………..
( A ) Mass, volume ( B ) Weight, mass
( C ) Brittleness, tough ( D ) Shape, shadow
16.Choose the correct statement from the following:
( A ) Conversion of solid into vapour without passing through the liquid state is called vapourisation.
( B ) Conversion of vapour into solid without passing through the liquid state is called sublimation.
( C ) Conversion of vapour into solid without passing through the liquid state is called freezing.
( D ) Conversion of solid into liquid is called sublimation.
17.The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?
( A ) 306 K, 329 K and 391 K ( B ) 308 K, 329 K and 392 K
( C ) 308 K, 329 K and 391 K ( D ) 329 K, 392 K and 308 K
18. ‘Panch Tatva’ of life.
( A ) Air, god, water, mother, father
( B ) Air, fire, earth, sky, water
( C ) Air, god, water, soil, crop
( D ) Air, god, water, yield, money
19.Which condition out of the following will increase the evaporation of water?
( A ) Increase in temperature of water
( B ) Decrease in temperature of water
( C ) Less exposed surface area of water
( D ) Adding common salt to water
20. Which of the following is the states of matter?
( A ) Solid ( B ) Liquid ( C ) Gas ( D ) all of the above.
21.In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
( A ) (i) and (iii) ( B ) (i) and (iv)
( C ) (ii) and (iii) ( D ) (ii) and (iv)
22. SI unit of temperature is
( A ) Celsius ( B ) Kelvin
( C ) Fahrenheit ( D ) none of the above.
23. Approximate value of kelvin in 0°C is
( A ) 273 K ( B ) 373 K ( C ) 290 K ( D ) 300 K
24.The boiling point of water at sea level is
( A ) 0°C ( B ) 273 K ( C ) 373 K ( D ) 273°C
25. SI unit of pressure is
( A ) Newton ( B ) Pascal ( C ) Watt ( D ) Second
26.Which of the following has the strongest interparticle forces at room temperature?
( A ) Oxygen ( B ) Water ( C ) Bromine ( D ) Iron
27. Which of the following relation is true regarding unit of pressure?
( A ) 1 atmosphere = 1.01×105Pa
( B ) 1 atmosphere = 2.01×105Pa
( C ) 1 atmosphere = 3.01×105Pa
( D ) 1 atmosphere = 4.01×105Pa
28.Which of the following conditions is most favourable for converting a gas into a liquid?
( A ) High pressure, low temperature
( B ) Low pressure, low temperature
( C ) Low pressure, high temperature
( D ) High pressure, high temperature
29. Boiling point of water is
( A ) 0°C ( B ) 100°C ( C ) 25°C ( D ) 37°C
30.Dry ice is
( A ) water in solid state ( B ) water in gaseous state
( C ) CO2 in liquid state ( D ) CO2 in solid state
31. Which of the following is the process in which solid state is directly changed to gaseous state without going through liquid state?
( A ) Evaporation ( B ) Sublimation ( C ) Boiling point( D ) Condensation
32. Kinetic energy of molecules is directly proportional to
(A)Temperature (B)Pressure
(C) Both (a) and (b) (D) Atmospheric pressure
33. In all the three states of water, (i.e. ice, liquid and vapour) chemical composition of water
(A) is very different
(B) remains same
(C) sometimes same and sometimes different
(D) none of the above
34. Which of the following statements is incorrect about the state of matter?
(A) The force of attraction between the gas particles is very less.
(B) Plasma consists of super energetic and super excited particles.
(C) The plasma glows with a special colour depending on the nature of the gas.
(D) Bose-Einstein condensate is formed by heating gas of extremely low density.
35. Which of the following is not a property of gas?
(A) Gases have a definite shape
(B) Gases have no definite volume
(C) The rate of diffusion of a gas is higher
(D) Gaseous particles are in a state of random motion
36. A form of matter that has no fixed shape but has a fixed volume. An example of this form of matter is ———————
(A) carbon dioxide (B) ice (C) water vapor (D) kerosene
37. When heat is constantly supplied by a burner to boiling water, then the temperature of the water during vaporisation:
(A) Rises very slowly
(B) Rises rapidly until steam is produced
(C) First rises and then becomes constant
(D) Does not rise at all
38. The process in which solid is directly converted to vapours state is called —————
(A) vapourisation (B) solidification (C) condensation (B) sublimation
39. The solid which undergoes sublimation is ——————
(A) ice cube (B) naphthalene
(C) sodium chloride (D) potassium chloride
40. Which of the following phenomena would increase on rising temperature?
(A) Diffusion, evaporation, compression of gases
(B) Evaporation, compression of gases, solubility
(C) Evaporation, diffusion, expansion of gases
(D) Evaporation, solubility, diffusion, compression of gases
41. Which of the following conditions is most favourable for converting gas into liquid?
(A) High pressure, low temperature
(B) Low pressure, low temperature
(C) Low pressure, high temperature
(D) High pressure, high temperature
42. Which of the following does not affect rate of evaporation?
(A) Wind speed (B) Surface area
(C) Temperature (D) Insoluble heavy impurities
43. Under which of the following conditions we can boil water at room temperature?
(A) At low pressure (B) At high pressure
(C) At very high pressure (D) At atmospheric pressure
44. Which of the following is incorrect about plasma?
(A)Fluorescent tube and neon sign bulbs consist of plasma.
(B)The gas gets ionised when electrical energy flows through it.
(C) It consists of super-energetic and super-excited particles.
(D) The plasma glows with colour which does not depend upon nature of gas.
45. Which of the following is most suitable for summer?
(A) Cotton (B) Nylon (C) Polyester (D) Silk.
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ANSWERS |
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1(C) |
2(C) |
3(B) |
4(C) |
5(D) |
6(A) |
7(C) |
8(C) |
9(A) |
10(D) |
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|
11(C) |
12(C) |
13(B) |
14(A) |
15(A) |
16(B) |
17(C) |
18(B) |
19(A) |
20(D) |
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21(C) |
22(B) |
23(A) |
24(C) |
25(B) |
26(D) |
27(A) |
28(A) |
29(B) |
30(D) |
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|
31(B) |
32(A) |
33(B) |
34(D) |
35(A) |
36(D) |
37(D) |
38(D) |
39(B) |
40(C) |
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41(A) |
42(D) |
43(A) |
44(D) |
45(A) |
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