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The pH of 0.1M solution of the following...

The `pH` of `0.1M` solution of the following salts decreases in the order

A

`HCl gt NaCl gt NH_(4)Cl gt NaCN`

B

`HCl gt NaCN gt NH_(4)Cl gt NaCl`

C

`NaCN gt NaCl gt NH_(4)Cl gt HCl`

D

`NH_(4)Cl gt NaCN gt NaCl gt HCl`

Text Solution

Verified by Experts

The correct Answer is:
C
`NaC1` (Salt of `S_(A)//S_(B)): pH = 7`
`NaCN` (Salt of `W_(A)//S_(B)): pH gt 7`
`HC1 (S_(A)): pH lt lt 7`
`NH_(4)C1` (Salt of `S_(A)//W_(B)) : pH lt 7`.
Hence the order is (c).
`NaCN gt NaC1 gt NH_(4)C1 gt HC1`
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