Question

A solid has a definite volume because
(a) its molecules are tightly packed together.
(b) its molecules are loosely packed and can slip over each other.
(c) its molecules are far apart from each other and can move freely.
(d) its molecules are hard and rigid.

Answer 1

(a) Its molecules are tightly packed together.

The molecules in a solid are tightly packed together. This gives a solid a definite volume.