Question

If a solid is dispersed in a liquid, the colloid is known as:

• A. gel
• B. sol
• C. emulsion
• D. none of the above

Answer 1

The correct option is B

sol

The explanation for the correct option:-

Option (B) sol

• It is a type of colloid where the dispersion medium is liquid and the particle is solid.
• There are two types of a sol, if the dispersion medium is air, then it is called aerosol, and if the dispersion medium is water then it is called hydrosol.
• Hence it is the correct option.

The explanation for the incorrect option:-

Option (A) gel

• The gel is a type of sol where the solid is the dispersion medium and the liquid particles get dispersed in it.
• Some examples are fruit jelly and cheese.
• Hence it is the incorrect option.

Option (C) emulsion

• It is a type of colloid where two or more immiscible liquids are present and also one liquid contains the dispersion of the other liquids.
• We can say that emulsions are a special mixture where the liquid does not mix with each other.
• An example is milk which is an emulsion of fat and water.
• Hence it is the incorrect option.

Option (D) None of the above

• As a solid when dispersed in a liquid, the colloid is known as sol, so the answer cannot be any of the above.
• Hence it is the incorrect option

Therefore, If a solid is dispersed in a liquid, the colloid is known as an option (B) sol.