Environment And Road Safety Education And Violence Against Women And Children And Drug Abuse 2021 Exam With Answers

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3.

The concentration of gaseous pollutant in 'ppm' is the volume of pollutant per _____ volume of air mixture.

A: $10^5$

B: $10^6$

C: $10^8$

D: $10^9$

The answer is: B

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Explanation

The concentration of gaseous pollutant in "ppm" (parts per million) is the volume of pollutant per 1 million volumes of air mixture. Therefore, the correct answer is (b) $10⁶$