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Anomalous Behavior of Lithium Halogens

A metal M rea...

Question

A metal M reacts with nitrogen to give nitride which on reaction with water produces ammonia gas. Metal M can be:

A

Na

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B

K

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C

Li

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D

Rb

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Solution

The correct option is A Li
The metal Lithium shows an exceptional behaviour by reacting in atmosphere of nitrogen to give lithium nitride ${L i}_{3} N$ which upon reaction with water produces ammonia gas.
$6 L i + N_{2} \to 3 {L i}_{3} N$
$3 L i_{3} N + H_{2} \to 3 L i O H + N H_{3}$

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Q. Which of the following alkali metals give nitride on reacting with nitrogen?

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Q. Name the following:
(i) Gas obtained by treating chlorine in excess of ammonia.
(ii) Solid obtained by passing ammonia over heated copper oxide.
(iii) Products obtained by burning ammonia in oxygen.
(iv) Substance used to dry ammonia.
(v) Liquid when added to metallic nitride that yield ammonia.
(vi) Indicator that turns deep pink when treated with NH₄OH.
(vii) Products obtained by treating ammonia with excess chlorine.
(viii) Basic gas that is used as a refrigerant.
(ix) Solution used to remove fat grease.
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(xi) Salt used to clean metal surfaces before soldering, tinning, etc.
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