Assertion :Statement-I : $C a S O_{4}$ dissolves in $(N H_{4})_{2} S O_{4}$ solution.
Reason: Statement-II : $C a S O_{4}$ forms a soluble complex of $(N H_{4})_{2} [C a (S O_{4})_{2}]$

Read the above assertion and reason and choose the correct option regarding it.

(A) Statement-I is true, Statement-II is true ; Statement-II is correct explanation for Statement-I.

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(B) Statement-I is true, Statement-II is true ; Statement-II is NOT a correct explanation for Statement-I.

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(D) Statement-I is false, Statement-II is true.

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Solution

The correct option is A (A) Statement-I is true, Statement-II is true ; Statement-II is correct explanation for Statement-I.
$C a S O_{4}$ reacts with $(N H_{4})_{2} S O_{4}$ to form soluble complex $(N H_{4})_{2} [C a (S O_{4})_{2}]$ .
Hence, Statement-I : $C a S O_{4}$ dissolves in $(N H_{4})_{2} S O_{4}$ solution.
(A) Statement-I is true, Statement-II is true ; Statement-II is correct explanation for Statement-I.

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