Question

Q6. Give
Q7. Define the following .
(i) Efflorescence
(ii) Deliquescence
(iii) Hygroscopy
(iv) Water of crystallization
(0) Anhydrous​

Answer 1

Answer:

Efflorescence: A whitish, powdery deposit on the surface of rocks or soil in dry regions. It is formed as mineral-rich water rises to the surface through capillary action and then evaporates. Efflorescence usually consists of gypsum, salt, or calcite.

Answer 2

Efflorescence is a crystalline or powdery deposit of salts often visible on the surface of concrete, brick, stucco, or natural stone surfaces. It occurs when water leaves behind salt deposits on the masonry surface.

Deliquescence is the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. Deliquescence occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapour in the air.

Hygroscopy is the phenomenon of attracting and holding water molecules via either absorption or adsorption from the surrounding environment, which is usually at normal or room temperature.

water of crystallization or water of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions.Water of crystallization can generally be removed by heating a sample but the crystalline properties are often lost.

Anhydrous free from water and especially water of crystallization.

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