Question

which phase change is occurring from point c to point e?
a solid is changing into a liquid.
a liquid is changing into solid.
a solid is changing into a gas.
a liquid is changing into a gas.

Explanation:

In a typical phase - change diagram (like a heating curve), when moving from point C to point E, if we assume that point C is in the liquid phase and point E is in the gas phase. The phase change from liquid to gas is called vaporization.

Answer:

A liquid is changing into a gas.