Table of Contents
Choose the correct options for the following questions.
Primary pollutants are:
Difficulty: Easy
A:
Oxides of sulphur
B:
Oxides of carbon
C:
Oxides of nitrogen
D:
All of these
Secondary pollutants are:
Difficulty: Easy
A:
PAN and Ozone
B:
Aldehydes ketons
C:
Sulphuric acid and peroxybenzol
D:
All of these
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