Question

91.. When water is heated from 0ºC to l0ºC. Its volume:

• A. (a) increases
• B. (b) decreases
• C. (c) does not change
• D. (d) first decreases and then increases

Answer 1

The correct option is D (d) first decreases and then increases

(D)
Initially at start of heating from 0°C to 4°C there

will be a contraction as a result of which volume

decreases. On further heating beyond 4°C to 10°C the

molecules gain kinetic energy and start moving more

randomly. Thus, intermolecular distance increases as

a result of which its volume increases.