Question of 20
Q.In which of the following is not considered as pollutant?
(a) NO2
(b) CO2
(c) O3
(d) C6H6
Bihar BsebBihar Board Intermediate 1st Year 2022MCQ· 1mImportance★★★★★
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Start your 14-day free trial to unlock the full solution →CO₂ is the odd one out — not a conventional pollutant — option (b).
From NCERT Class 11 Chemistry (Environmental Chemistry):
- NO₂: toxic oxide of nitrogen, causes acid rain and photochemical smog — a pollutant.
- O₃ at ground level: a secondary pollutant (photochemical smog), harmful to lungs.
- C₆H₆ (benzene): a toxic, carcinogenic hydrocarbon pollutant. …
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