Question

(a) What is sublimation ? Name two substances (other than ammonium chloride) which undergo sublimation.
(b) Draw a labelled diagram of the experimental set-up to demonstrate the sublimation of ammonium chloride.

Answer 1

(a) Sublimation: The change of a solid directly into vapour on heating and of vapour into solid on cooling is known as sublimation.
Iodine and camphor are the compounds which undergo sublimation.

(b) The diagram below shows the experiment set up to study the sublimation of ammonium chloride.