Question

Choose the substance that will not undergo sublimation.

• A. Iodine
• B. Ammonium chloride
• C. Camphor
• D. Bromine

Answer 1

The correct option is D

Bromine

At room temperature, elemental iodine is a black-bluish solid. When heated, solid iodine sublimates and enters the gas phase. Ammonium chloride sublimes when heated; the substance changes directly from being solid to gas. The gas does not consist of ammonium chloride molecules but ammonia and hydrogen chloride Camphor directly sublimes to gas at room temperature.

Bromine at room temperature is a liquid and becomes gas when heated so it does not sublime instead undergoes vaporisation.