Assertion : A sol of `As_(2)S_(3)` prepared by the action of `H_(2)S on As_(2)O_(3)` is negatively charged.
Reason : It is due to the adsorption of `H^(+)` ions on the surface of the colloidal particles and `S^(2-)` ions on the diffused layer.

Options

A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If assertion and reason both are incorrect.

Answer

C

Explanation

Correct reason. It is due to the adsorption of the `S^(2-)` ions on the surface of the colloidal particles and `H^(+)` ions in the diffused layer.