Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Surface Chemistry

Question:

When KI solution is added to AgNO3 solution, then:

A. Ag+ ions from dispersion medium get adsorbed on AgI.

B. Positively charged sol is formed.

C. Negatively charged sol is formed.

D. K+ ions of dispersed phase get adsorbed on AgI.

Choose the correct answer from the options of given below:

Options:

A and C only

B and D only

C only

A and B only

Correct Answer:

A and B only

Explanation:

When KI solution is added to AgNO3 solution, then a positive sol of AgI will be formed.

This happens due to preferential adsorption of Ag+ ions from dispersion medium on the precipitate of silver iodide AgI.