State True or False.

The action of water on magnesium nitride is .

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept: Metal nitrides decompose to metal hydroxide and ammonia on treatment with water.
Nitride is an ion of nitrogen in the -3 oxidation state. Magnesium hydroxide

decomposes to its hydroxide and ammonia. This is a common reaction for metal nitrides.
The reaction is as follows;

The

can be identified by its solubility in sodium hydroxide. Both magnesium nitride and hydroxide are soluble in

N a O H

. While lead hydroxide dissolves in

N a O H

. This is used to distinguish between them.
The ammonia produced can be identified by treating it with

H C l

. To the gas produced, a glass rod dipped in

H C l

is shown.

which produces dense white vapours of

on this test.
Hence, the correct answer is option 1.

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