Question

Ammonia can be collected by displacement of

• A. Water
• B. $Conc.H_{2}S{O}_4$
• C. Brine
• D. Mercury

Answer 1

Answer: (D)

Mercury

Ammonia is an extremely soluble gas and cannot be collected by displacement of water or acid. It can only be collected over a liquid in which it does not dissolve.

One such liquid is mercury because it does not react with ammonia and it can be easily collected by displacement of the metal as it is liquid at room temperature.