Question

Why lyophilic sols are more stable than lyophobic sols?

• A. Colloidal particles have a positive charge
• B. Colloidal particles have no charge
• C. Colloidal particles are more solvated
• D. Strong electrostatic repulsion between the negatively charged colloidal particles.

Answer 1

The correct option is C

Colloidal particles are more solvated

Explanation for correct option:

(C) Colloidal particles are more solvated.

• Lyophilic means liquid loving and lyophobic means liquid hating.
• Lyophilic colloids are more solvated when compared to lyophobic. So, lyophilic colloids are more stable than lyophobic.
• Also, the presence of charge on colloidal particles helps for stability.
• When lyophilic and lyophobic are mixed, the lyophilc shiedls the lyophobic from electrolytes. So, this is the correct option.

Explanation for incorrect option:

(A) Colloidal particles have a positive charge.

• Actually colloidal particles have a negative charge, no positive charge. So, it is an incorrect option.

(B) Colloidal particles have no charge.

• The colloidal particles are charged. So, it is an incorrect option.

(D) Strong electrostatic repulsion between the negatively charged colloidal particles.

• The strong electrostatic repulsion of colloidal particles does not account for the stability of lyophilic colloids. So, this is an incorrect option.

Therefore, the correct option is (C) Colloidal particles are more solvated