Question

Give an experiment to show that ammonium chloride shows sublimation?

Answer 1

Put an inverted funnel on the china dish and insert a cotton plug in the stem of the funnel. Heat the china dish on a low flame. In the inside of the funnel white deposits of ammonium chloride is seen which directly converts into gaseous state and then solidifies.

Answer 2

Experiment to show that ammonium chloride undergoes sublimation:

(a) Take an inverted funnel and inside it china dish with crystal of ammonium chloride .

(b) Heat the crystals with the help of a burner.

(c) As soon as the crystal is heated, we observe the vapours of and the solidified Ammonium chloride along the walls at the upper end of the beaker.

(d) This shows that solid ammonium chloride does not undergo liquid state but directly changes to vapour state which them solidifies i.e. it undergoes sublimation (solid changes directly to gases without undergoing liquid state).