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Question

State the odour of HCl gas.


A

Pungent, choking smell

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B

Sweet smell

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C

Burnt smell

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D

Rotten egg smell

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Solution

The correct option is A

Pungent, choking smell


Hydrogen chloride is a colourless gas of strong pungent, choking odour; it condenses at -85° C (-121° F) and freezes at -114° C (-173° F). The gas is very soluble in water: at 20° C (68° F) water will dissolve 477 times its own volume of hydrogen chloride. Because of its great solubility, the gas fumes in moist air.


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