Question

Which of the following element is not in the liquid state at room temperature?

• A. $Hg$
• B. $Li$
• C. $Ga$
• D. $Br$

Answer 1

Answer: (B)

$Li$

Bromine and mercury are metal which is liquid at room temperature. Gallium a brittle solid at low temperatures, and a liquid at temperatures greater than ${29.76}^{o}C$ (slightly above room temperature).Thus gallium is liquid at room temperature.

Bromine is a liquid because electrons are well apart from the nuclei so they are easily distorted .Intermediate intermolecular forces exists and thus it is in liquid state.

Lithium is a solid at room temperature.