A) Temperature does not change while a solid substance is converted into liquid or a liquid substance is converted into gas.
b) A vapour on cooling changes into liquid and on further cooling changes into solid.
c) Matter changes from one state to another either raising the temperature or lowering the the temperature.
d) A change in which a solid on heating directly changes into vapour state is called sublimation,
e) The inter particle spaces are greater in gaseous and less in solids.