Why does the temperature of a substance not rise during a change of state?

Explain:
$(a)$ Sponge,though compressible,is a solid.
$(b)$ Gases completely fill the vessel in which they are kept.

Arrange honey, water, and hydrogen in descending order on the basis of the following properties exhibited by them:
$(a)$ Kinetic energy
$(b)$ Density

During summer,water kept in an earthen pot becomes cool because of the phenomenon of

$(a)$ Explain with the help of an activity which shows that particles of matter are very small.
$(b)$ Define matter. Name the states of matter in which the forces between the constituent particles are
$(i)$ strongest
$(ii)$ weakest
$(c)$ When sugar and common salt are kept in different jars,they take the shape of the jars. Are they solid? Justify your answer.

Which one of the following sets of phenomena would increase on raising the temperature?