Multiple choice

The gaseous pollutant causing death in its heavy doses is

  1. sulphur dioxide

  2. hydrogen sulphide

  3. hydrogen cyanide

  4. ammonia gas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When cyanide chemicals are used in the manufacturing process, hydrogen cyanide is formed as a by product. It is a highly corrosive and poisonous gas, leading to eye irritation, respiratory problems as well as other complications. In high doses, it can cause death.

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