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Q.

0.1 M aqueous solution of ${HClO}_{4}, {ZnCl}_{2} and K_{2} S$ are taken, then increasing order of $p H$ of solutions will be:

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a

$K_{2} S < {HClO}_{4} < {ZnCl}_{2}$

b

${HClO}_{4} < {ZnCl}_{2} < K_{2} S$

c

${HClO}_{4} < K_{2} S < {ZnCl}_{2}$

d

$K_{2} S < {ZnCl}_{2} < {HClO}_{4}$

answer is C.

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Detailed Solution

${HClO}_{4} \to Strong acid$

${ZnCl}_{2} \to Salt of S A and W B$

$k_{2} S \to Salt of S B and WA$

Hence, option C is correct.

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