Question

Ammonium chloride shows the property of

• A. Boiling
• B. Sublimation
• C. Freezing
• D. Cooling

Answer 1

The correct option is B

Sublimation

The explanation for the correct option:

(b) Sublimation:

1. Ammonium chloride has the property of sublimation.
2. Because ammonium chloride is sublime after heating, it will transform instantly to vapour.
3. This vapour will condense once more in the higher, colder region of the funnel, forming solid ammonium chloride.
4. The combination of ammonium chloride and salt can therefore be separated using the sublimation process.

The explanation for incorrect options:

(a) Boiling:

1. Boiling is the fast evaporation of a liquid that occurs when it is heated to its boiling point, which is the temperature at which the liquid's vapour pressure equals the pressure exerted on the liquid by the surrounding environment.
2. When water is heated until it becomes steam, this is an example of boiling.

(c) Freezing:

1. Freezing, also known as solidification, is a phase change in which a liquid freezes.
2. The production of ice cubes in an ice tray when water is left in the freezer for some time is the most common example of freezing that is noticed every day.

(d) Cooling:

1. Cooling is the process of removing heat, which typically results in a lower temperature and/or phase change.
2. Cooling is demonstrated by putting ice in your drink.

Hence option (b) is the correct option, Ammonium chloride has the property of sublimation.