(i) Lyophobic sol is protected.

(ii) Lyophilic sol is protected.

(iii) Film of lyophilic sol is formed over lyophobic sol.

(iv) Film of lyophobic sol is formed over lyophilic sol.

Correct Answers:

(i) Lyophobic sol is protected.

(iii) Film of lyophilic sol is formed over lyophobic sol.

Explanation: When a lyophilic sol is added to a lyophobic sol, the lyophobic sol is protected and the film of lyophilic sol is formed over lyophobic sol.