Question

. Discuss an activity to show sublimation of ammonium chloride. Also draw well labelled diagram for the mentioned activity.

Answer 1

Answer:

Put an inverted funnel over the china dish. Put a cotton plug on the stem of the funnel, as shown in the diagram below. Now, heat the china dish slowly with the help of a Bunsen burner and observe. Ammonium chloride which is in the solid state on exposure to heat will directly change into the vapour state.

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Answer 2

Answer:

To show that some substances change directly from solid state to gaseous state and vice versa without changing into the liquid state by the method of sublimation.

Theory - Sublimation  - A change of state directly from solid to gas without changing into liquid state is called sublimation.

Deposition - the direct change of gas to solid without changing into liquid is called Deposition.

Materials Required -  Ammonium chloride, china dish, glass funnel, burner, tripod stand, wire gauge, cotton.

Procedure

Take some camphor or ammonium chloride. Crush it and put it in a china dish.

Put an inverted funnel over the china dish.

Put a cotton plug on the stem of the funnel, as shown in figure

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