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).
(i) Assertion and reason both are correct and the reason is correct explanation
(ii) Assertion and reason both are correct but reason does not explain
(iii) Assertion is correct but reason is incorrect.
(iv) Both assertion and reason are incorrect.
(v) Assertion is incorrect but reason is correct.
NCERT Class XII
Chemistry - Exemplar Problems
Chapter 5. Surface Chemistry