Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The conversion of fresh precipitate to colloidal state is called peptization. Reason: It is caused by addition of common ions.A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: B
Solution :
Correct reason to assertion is that common ion adsorb on the surface of precipitate. Due to repulsion between adsorbed ions, the precipitate undergo fragmentation resulting in colloidal state.
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