Question

Mercury _______ when temperature decreases and _______ when temperature increases.

• A. expands, contracts
• B. remains still, expands
• C. contracts, expands
• D. contracts, remains still

Answer 1

The correct option is C contracts, expands

Generally all metals expand on heating and contract on cooling i.e. when a metal is heated its volume increases and when it is cooled its volume decreases.
Simillarly, mercury being a liquid metal and a good conductor of heat, contracts and expands when temperature decreases and increases respectively.