MCQ practice · SSC Chemistry Board questions · Chapter 1: Concepts of Chemistry
Which is an irritant substance?
Think it through first, then pick an option.
- a Benzene
- b Organic peroxide
- c Nitrous oxide
- d Methanol
Answer and explanation
Correct answer: c Nitrous oxide
Dust, dilute acids, alkalis and nitrous oxide are irritant substances.
Why the other options are wrong
- a Benzene: Benzene is toxic and a health hazard; nitrous oxide is the irritant example.
- b Organic peroxide: Organic peroxide is explosive, not an irritant.
- d Methanol: Methanol is a toxic substance, not an irritant.
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