Question

Clouds are colloidal solution of -

• A. solid in air
• B. water in air
• C. air in solid
• D. air in water

Answer 1

The correct option is B

water in air

Explanation for the correct option :

Option (B): water in air

• A colloid is known as a mixture in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance.
• The clouds basically consist of charged particles of water dispersed in the air.
• Where Some of them are positively charged and others are negatively charged.

Explanation for the incorrect option :

Option (A): Solid in air

• In the case of the colloids formed by solid in the air, solid is known as the dispersed phase and the air is known as the dispersion medium.
• Example related to this type of colloid is: Dust suspended in air
• Hence Clouds are not the colloidal dispersions of solid in the air.

Option (C): Air in solid

• The colloids formed by air in solid, solid are known as the dispersion medium and the air is known as the dispersed phase.
• Example include: solid foam
• Thus Clouds are not known as colloidal dispersions of air in solid.

Option (D): Air in water

• In the case of the colloids formed by air in water, the air is known as the dispersed phase and the water is known as the dispersion medium.
• Example related to this type of colloid is: Foam
• Hence, Clouds are not referred to as colloidal dispersions of air in water.

Hence, Clouds are colloidal dispersions of water in air .