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Q.

(A): Addition of AgNO3(aq) to excess of KI(aq) gives ve sol whereas addition of KI(aq) to excess of AgNO3 gives +ve sol
(R): The sol particles adsorbs the common ions present in solution and acquire their charge

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a

A is correct but R is wrong

b

A is wrong but R is correct

c

Both A and R are correct and R is correct explanation of A 

d

Both A and R are correct and R is not correct explanation of A

answer is B.

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Detailed Solution

AgNO3+KI(excess)[AgI]I

KI+AgNO3(excess)[AgI]Ag+

The  preferential adsorption of common ion on AgI particles provides ve and +ve charge.

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