Question

Assertion: Coagulation power of Al³⁺ is more than Na⁺.

Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy Schulze rule).

विकल्प

• Assertion and reason both are correct and the reason is correct explanation of assertion.

• Assertion and reason both are correct but reason does not explain assertion.

• Assertion is correct but reason is incorrect.

• Both assertion and reason are incorrect.

• Assertion is incorrect but reason is correct.

Answer 1

Assertion and reason both are correct and the reason is correct explanation of assertion.

Explanation:

To Hardy-Schulze law, the greater is the valency of the coagulating ion, the more is the power to coagulate the colloidal solution. Thus, coagulation power of Al³⁺is greater than that of Na⁺.