Question

A chinadish containing a mixture of ammonium chloride, common salt and
fine sand is covered with an inverted glass funnel having a cotton plug at its
tube end. A student heats the dish strongly.
a. Name the phenomenon taking place in the above activity.
b. Give examples of any two other solids that shows the above phenomenon.
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Answer 1

Answer:

sublimation is process here ammonium chloride is sublimed

Answer 2

Answer:

The phenomenon taking place in this process of a mixture of common salt, ammonium chloride and fine sand is known as a separation by sublimation.

Explanation:

The process of vaporization of a solid is verified as sublimation. The changes in the solid state of a material will be freezing, melting, evaporating and the sublimating where sublimation has two common phase transitions.

Sublimation is a process where the solid material directly changes into gas without forming a liquid phase transition.

For example: Ammonium chloride, iodine (salt), dry ice, and camphor.