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Oxides of Group 16

Which one of ...

Question

Which one of these gas in air is explosive at concentrations over 5.6%?

A

HCl

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B

HF

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C

HCN

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D

Ammonia

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Solution

The correct option is B HCN
Hydrogen cyanide gas in air is explosive at concentrations over 5.6%. This is far above its toxicity level.

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