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Diagonal Relationship between Li and Mg

Fe OH 3 and ...

Question

${F e (O H)}_{3}$ and ${A l (O H)}_{3}$ ppt. can be separated by $N a O H$ when ${A l (O H)}_{3}$ becomes soluble due to the formation of ${N a A l O}_{2}$ and ${F e (O H)}_{3}$ remains insoluble.

A

True

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B

False

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C

Ambiguous

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D

None of these

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Solution

The correct option is C True
${F e (O H)}_{3}$ and ${A l (O H)}_{3}$ ppt. can be separated by $N a O H$ when ${A l (O H)}_{3}$ . becomes soluble due to the formation of. ${N a A l O}_{2}$ , and ${F e (O H)}_{3}$ remains insoluble.
$A l (O H)_{3} + N a O H ⟶ N a [A l O_{2}] s o d i u m m e t a a l u m i n a t e + 2 H_{2} O$

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