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O-LevelChemistryChemistry of the Environment5070/12 · Oct/Nov 2017 · Q341 Mark

Dry air is a mixture of gases of which 99% is nitrogen and oxygen. What is the main constituent of the remaining 1%?

Aargon

Bhelium

Chydrogen

Dwater vapour

✓ Correct answer

A: argon

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About this question

Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 34.

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