1.

The conversion of fresh precipitate to colloidal state is called peptization. (r) It is caused by addition of common ions.

Answer»

IF both (A) and (R) are correct and (r) is the correct EXPLANATION for (a).
If both (a) and (r) are correct but (r) is not the correct explanation for (a).
IF (a) is correct but (r) is incorrect.
If (a) is incorrect but (r) is correct.

ANSWER :B


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