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

The pH of 0.1 M solution of the following salts increases in the order

A

`naCl lt NH_(4)Cl lt NaCN lt HCl`

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
HCl is most acidic so pH will be minimum. `NH_(4)Cl` is a salt of weak base and strong acid so its solution will be slightly acidic NaCl is a salt of strong acid and strong base so the solution will be neutral (i.e. pH = 7) NaCN is a salt of strong base NaOH and weak acid HCN, so the solution will be slightly basic, hence pH will be maximum .
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