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Uses of Alkaline Earth Metals

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Question

The solution of sodium meta aluminate on boiling with ammonium chloride gives a white precipitate of :

A

{A l}_{2} O_{3}

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B

{A l C l}_{3}

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C

{A l (O H)}_{3}

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D

{N a A l (O H)}_{4}

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Solution

The correct option is D ${A l (O H)}_{3}$
The solution of sodium meta aluminate on boiling with ammonium chloride gives a white precipitate of aluminum hydroxide ${A l (O H)}_{3}$ .
$N a A l O_{2} + N H_{4} C l + H_{2} O \to {A l (O H)}_{3} + N a C l + N H_{3}$

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