1.

Excess of concentrated sodium hydroxide can separate mixture of

Answer»

`Al^(3+)` and `Cr^(3+)`
`Cr^(3+)` and `Fe^(3+)`
`Al^(3+)` and `Zn^(3+)`
`Zn^(2+)` and `Pb^(2+)`

Solution :`AI^(2+),Zn^(2+) and Cr^(2+)` form a soluble COMPLEX with excess of `NAOH` WHEREAS `Fe^(2+)` does not


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