MCQ- 6 ICSE Physics class 10 ch-5 Heat

Change of State, Temperature & Pressure - Class 10 Physics

1. What is the effect of increasing temperature on a solid substance?

It contracts.
It expands.
It changes color.
It becomes harder.

Correct Answer: It expands.

2. What happens to the boiling point of water when pressure increases?

It increases.
It decreases.
It remains the same.
It becomes zero.

Correct Answer: It increases.

3. What is the heat required to change the state of a substance without changing its temperature called?

Sensible heat
Latent heat
Radiant heat
Convection heat

Correct Answer: Latent heat

4. What happens when ice melts at 0°C?

It absorbs heat without changing temperature.
Its temperature rises gradually.
It cools down.
It evaporates instantly.

Correct Answer: It absorbs heat without changing temperature.

5. What is the process of changing a liquid into gas by heating called?

Condensation
Vaporization
Freezing
Solidification

Correct Answer: Vaporization