matter in our surroundings

Front

What is diffusion?

Back

Intermixing of particles of two different types of matter on their own.

Front

Melting point of ice

Back

273 K

Front

Physical state of water at 25°C, 0°C, 100°C respectively.

Back

Liquid, solid, and gas.

Front

If the humidity in the air increases, what happens to the rate of evaporation?

Back

decrease

Front

Assertion: We should wear cotton clothes in summer. Reason: Nylon is a good absorber of sweat.

Back

Assertion is true but reason is false.

Front

A change of state directly from solid to gas without changing into liquid state is called

Back

sublimation

Front

The amount of heat energy required to change 1kg of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of vaporisation.

Back

False

Front

Which of the following is not true about gaseous state?

• high compressibility
• rate of diffusion is lower than solids
• particles move at randomly high speed

Back

rate of diffusion is lower than solids

Front

Which of the following have the least inter atomic spacing? Options: plasma, liquid, solid, gas

Back

solid