From separate solutions of sodium salts, NaW, NaX, NaY and NaZ have pH 7.0, 9.0 10.0 and 11.0 respectively. When each solution was 0.1 M, the strongest acid is

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answer is A.

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Detailed Solution

The salt hydrolysis in each case occurs except NaW because its pH = 7. Thus HW is strongest acid.

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