RRB RPF RPSF SI and CONS Model Papers 9 with solutions

Question : 112 of 120

Marks: +1, -0

Which of the following is an air pollutant ?
I. Water vapour
II. Carbon dioxide
III. Hydrogen Gas

Only I
Only II
Only III
Both II and III

Solution:

(2) An air pollutant is a substance in the air that can have adverse effects on humans and the ecosystem.Because of its role as a greenhouse gas Carbon dioxide (CO

_{2}

) has been described as “the leading pollutant” and “the worst climate pollution”. Other examples include carbon monoxide gas from motor vehicle exhaust, or the sulfur dioxide released from factories.

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