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Which of the following gases is a deadl...

Which of the following gases is a deadly poison ?

A

`O_(2)`

B

`H_(2)S`

C

`SO_(2)`

D

`HCN`

Text Solution

Verified by Experts

The correct Answer is:
D
`O_(2)` is essential for survival . Hydrogen sulphide `(H_(2)S)` and hydrogen cyanide `(HCN)` are deadly poisons. `HCN` is more poisonous. `SO_(2),O_(3),NO_(2)`, and `CO` are less toxic.
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