Question

What is the melting point of a substance?

(A) When its temperature changes from a
gas to a liquid.
B When its temperature changes from a
liquid to a solid.
© When its temperature changes from a
liquid to a gas.
D When its temperature changes from a
solid to a liquid.

Answer 1

It’s d but I’m not sure

Answer 2

D.) when its temperature changes from a solid to a liquid

Step-by-step explanation:

At the melting point the solid and liquid phase exist in equilibrium.