Asubstance has a freezing point of 24 °c. which of the following is true for the substance?
it will also change from a solid to a liquid at 24 °c while the solid loses energy.
it will also change from a solid to a liquid at 24 °c while the solid gains energy.
it will also change from a solid to a gas at 24 °c while the solid loses energy.
it will also change from a solid to a gas at 24 °c while the solid gains energy.

It will also change from a solid to a liquid at 24°C while the solid gains energy.

Explanation:

Freezing point is the temperature at which a solid and liquid co-exist.

In other words,it is the temperature at which a solid gains energy to overcome the force of attraction between molecules to become liquid or a liquid looses energy to become a solid.

Hence at 24°C:

Now let us check the options:

The last two options are wrong since conversion is not between solid and gas.It is between solid and liquid.

The first option is wrong as solid gains energy to become liquid.

Hence the correct answer is second option.