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Potassium Dichromate

Concentrated ...

Question

Concentrated aqueous sodium hydroxide can separate mixture of

$A l^{3 +} a n d S n^{2 +}$

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$A l^{3 +} a n d F e^{3 +}$

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$A l^{3 +} a n d Z n^{3 +}$

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$Z n^{3 +} a n d P b^{2 +}$

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Solution

The correct option is B
$A l^{3 +} a n d F e^{3 +}$

$N a O H + A l^{+ 3} \to N a A l O_{2}$

$N a O H + F e^{+ 3} \to N o r e a c t i o n (I n s o l u b l e i n N a O H)$

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