MHT CET 2022 Chemistry question

The increasing order of pH of 0.1 M solution of the following compounds is

(A)HCl<NaCl<NaCN<
(B)<HCl<NaCl<NaCN
(C)NaCN<NaCl< <HCl
(D)HCl< <NaCl<NaCNCorrect

Answer: (D)

Solution

0.1 M HCl is a strong acid with pH = 1, the lowest. is a salt of a weak base and a strong acid, so hydrolyses and the solution is weakly acidic (pH about 5). NaCl is a salt of a strong acid and a strong base, so it is neutral (pH = 7). NaCN is a salt

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Question ID VK-094297