Curriculum
Course: Science — Third Preparatory
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Quiz

Question bank: Unit 1 — Chemical Reactions and Their Environmental Impacts

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1.
The brown, pungent gas formed from nitrogen oxides in air is:
NO
N₂
NO₂
N₂O₃ only
2.
Which gas with a choking odour is formed by burning sulphur-containing fuel?
SO₂
CO₂
CO
H₂O
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