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प्रश्न
Photochemical smog does not generally contain ______.
पर्याय
NO
NO2
SO2
HCHO
MCQ
रिकाम्या जागा भरा
उत्तर
Photochemical smog does not generally contain SO2.
Explanation:
Nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and compounds with a −CHO group are all components of photochemical smog.
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