Matter in our surroundings

Which of the following phenomena always results in the cooling effect?

• Condensation

• Evaporation

• Sublimation

• None of these

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following does not affect rate of evaporation?

• Wind speed

• Surface area

• Temperature

• Insoluble heavy impurities

Kinetic energy of molecules is directly proportional to

• Temperature

• Pressure

• Both (a) and (b)

• Atmospheric pressure

Tags

NGSS.MS-PS1-4

Which of the following is most suitable for summer?

• Cotton

• Nylon

• Polyester

• Silk.

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

During summer, water kept in an earthen pot becomes cool because of the phenomenon of

• diffusion

• transpiration

• osmosis

• evaporation

Tags

NGSS.MS-PS1-4

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

Tags

NGSS.MS-PS2-5

Dry ice is

• water in solid state

• water in gaseous state

• CO2 in liquid state

• CO2 in solid state

Tags

NGSS.MS-PS1-4