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Test for Ammonia

The gas which...

Question

The gas which gives a white ppt. when reacted with $A g N O_{3}$ soln. acidified with dilute nitric acid:

A

ammonia

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B

hydrogen chloride

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C

hydrogen sulphide

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D

sulphur dioxide

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Solution

The correct option is B hydrogen chloride
${A g N O}_{3} + H C l + {H N O}_{3} \to A g C l + {H N O}_{3}$
Addition of colourless aqueous silver nitrate to hydrochloric acid-producing white precipitates of $A g C l$ which is a common test for chloride ion presence.

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