Conectrated aqueous sodium hydroxide can be a separated mixture of

Options

A. `Al^(3+)` and `Sn^(2+)`
B. `Al^(3+)` and `Fe^(3+)`
C. `Al^(3+)` and `Zn^(2+)`
D. `Zn^(2+) ` and `Pb^(2+)`

Answer

B

Explanation

`NaOH + Al^(+3) to underset("(Soluble in NaOH)")underset("Sod. Metaluminate")(NaAlO_(2))`
` NaOH + Fe^(+3) to `No reaction (insoluble in NaOH)