Concentrated sodium hydroxide can separate a mixture ofA. `Al^(3+)` and `Cr^(3+)`B. `Cr^(3+)` and `Fe^(3+)`C. `Al^(3+)` and `Zn^(2+)`D. `Zn^(2+)` and `Pb^(2+)`

Concentrated sodium hydroxide can separate a mixture ofA. `Al^(3+)` an

1.	Concentrated sodium hydroxide can separate a mixture ofA. `Al^(3+)` and `Cr^(3+)`B. `Cr^(3+)` and `Fe^(3+)`C. `Al^(3+)` and `Zn^(2+)`D. `Zn^(2+)` and `Pb^(2+)`
Answer» `Cr^(3+) + 3OH^(-) to underset("Dirty green ppt.")(Cr(OH)_(3)) ` `2Cr(OH)_(3)+4NaOH +3[O] to underset("soluble yellow soluiton")(2Na_(2)CrO_(4))+5H_(2)O` `Fe^(3+) +3OH^(-) to underset("Brown ppt.")(Fe(OH)_(3))` `Fe(OH)_(3)` is not affected by conc. NaOH

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Concentrated sodium hydroxide can separate a mixture ofA. `Al^(3+)` and `Cr^(3+)`B. `Cr^(3+)` and `Fe^(3+)`C. `Al^(3+)` and `Zn^(2+)`D. `Zn^(2+)` and `Pb^(2+)`

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