The property of a substance to absorb moisture from the air on exposure is called A. Osmosis B. Deliquescence C. Efflorescence D. Desiccation

Osmosis
Deliquescence
Efflorescence
Desiccation

The correct answer is B. Deliquescence.

Deliquescence is the property of a substance to absorb moisture from the air on exposure, and dissolve itself in the absorbed water. This is due to the fact that the substance has a high affinity for water molecules. When the substance comes into contact with water vapor in the air, the water molecules are attracted to the surface of the substance and form a layer of liquid. This layer of liquid dissolves the substance, and the resulting solution is then absorbed into the substance.

Osmosis is the movement of water molecules across a semipermeable membrane from an area of high water concentration to an area of low water concentration.

Efflorescence is the process by which salts crystallize on the surface of a material due to the loss of water of hydration.

Desiccation is the process of drying something out.

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