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Laboratory Preparation of Ammonia

Which of the ...

Question

Which of the following is a colourless gas with a smell of rotten egg?

A

Ammonia

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B

Hydrogen sulphide

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C

Sodium hydride

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D

Calcium hydride

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Solution

The correct option is B
Hydrogen sulphide

When hydrogen gas is passed over boiling sulphur, a colourless gaseous hydrogen sulphide $(H_{2} S)$ with a smell of rotten egg is formed.

The chemical reaction is as follows:

$S + H_{2} \to H_{2} S$

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