Aqueous solution of which of the following shows lower pH ?

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K2SO4

ZnCl2

KCN

CH3COONH4

answer is B.

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Detailed Solution

For a low PH situation, the salt must be a salt of strong acid and weak base.ZnCl2 is a salt of stong acid (HCl) and weak base (Zn(OH)2).

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