1.

ThepH 0.1 M solution of the following salts increases in the order :

Answer»

`NACL lt NH_(4) CL lt NaCN lt HCl`
`HCl lt NH_(4) Cl lt NaCl ltNaCl`
`NaCN lt NH_(4) Cl lt NaCl lt HCl`
`HCl lt NaCl lt NaCN lt NH_(4) Cl`.

Solution :NaCl = neutral (pH=7) , `NH_(4)Cl` = SLIGHTLY acidic
`(pH lt 7) , NaCN = "basic" (pH gt 7) , HCl = "Strongly acidic"(pH lt lt 7)`.
`:.` ORDER will be `HCl lt NH_(4)Cl lt NaCl lt NaCN`.


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