1.

Which of the following mixtures, of ions in solution can be separated by using NaOH solution?

Answer»

`FE^(+3)` and `Pb^(+2)`
`Pb^(+2)` and `SN^(+2)`
`Zn^(+2)` and `Sn^(+2)`
`Al^(+3)` and `Cu^(+2)`

SOLUTION :`Pb^(2+), Al^(3+)` SOLUBLE in excess NAOH but not `Fe^(3+)` and `Cu^(2+)`


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