Assertion: On heating, a solid usually change to a liquid and the liquid on further heating change to the gaseous state.
Reason : Arrangement of constituent particles is different in solid, liquid and gaseous state.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

On heating, the interparticle distance and freedom of movment of particles increased and interparticle force decrease. Hence, on heating solids changes to liquids, where the particles are comparatively less close to each other and hence can move around. Liquids on futher heating changes to gaseous state, in which the particles are far apart as compared to solids or liquids and their movement in easy and fast.