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JEEMAIN and NEET
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Chemistry
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Environmental Chemistry
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Q)
Which of the following is primary pollutant?
(
a
)
H
2
S
O
4
(
b
)
a
c
r
o
l
e
i
n
(
c
)
f
o
r
m
a
l
d
e
h
y
d
e
(
d
)
C
O
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