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The aqueous solution of potash alum [K2SO4.Al2(SO4)3.24H20] is acidic due to

(A) hydrolysis of K+

(B) hydrolysis of SO42-

(C) hydrolysis of Al3+

(D) presence of acid in its crystal as impurity.

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The aqueous solution of potash alum [K2SO4.Al2(SO4)3.24H20] is acidic due to hydrolysis of Al3+.

So, The correct option is (C).

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