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- 1. Multiple Choice
Which of the following phenomena always results in the cooling effect?
Condensation
Evaporation
Sublimation
None of these
- 2. Multiple Choice
Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?
Latent heat
Lattice energy
Loss of heat
None of these
- 3. Multiple Choice
Which one of the following set of phenomena would increase on raising the temperature?
Diffusion, evaporation, compression of gases
Evaporation, compression of gases, solubility
Evaporation, diffusion, expansion of gases
Evaporation, solubility, diffusion, compression of gases
- 4. Multiple Choice
Which of the following does not affect rate of evaporation?
Wind speed
Surface area
Temperature
Insoluble heavy impurities
- 5. Multiple Choice
Kinetic energy of molecules is directly proportional to
Temperature
Pressure
Both (a) and (b)
Atmospheric pressure
- 6. Multiple Choice
Which of the following is most suitable for summer?
Cotton
Nylon
Polyester
Silk.
- 7. Multiple Choice
The property of flow is unique to fluids. Which one of the following statements is correct?
Only gases behave like fluids
Gases and solids behave like fluids
Gases and liquids behave like fluids
Only liquids are fluids
- 8. Multiple Choice
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
diffusion
transpiration
osmosis
evaporation
- 9. Multiple Choice
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?
Water, air, wind
Air, sugar, oil
Oxygen, water, sugar
Salt, juice, air
- 10. Multiple Choice
Dry ice is
water in solid state
water in gaseous state
CO2 in liquid state
CO2 in solid state
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