People, Development and Environment
9.77
ASSESS YOUR LEARNING
2.
The oxides of nitrogen are the main pollutants
released by burning of diesel fuel that results in
photochemical smog.
3.
All hydrocarbons, except methane, contribute to
the production of photochemical smog.
4.
This smog is typically worse in the summer as
there is more solar energy to drive photochemi-
cal reactions.
(a) 1, 2, 3, and 4
(b) 1, 2, and 3
(c) 2, 3, and 4
(d) 3 and 4
134.
What were significant changes in the Indian Bharat
Stage (BS) emission standards from BS-IV to BS-VI?
(a) A drastic reduction in sulphur content in fuel,
from 50 ppm to 10 ppm. ...
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