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Exam-style practice

Air quality and climate answer explanations

Review worked answers and explanations for Air quality and climate. Aligned to Cambridge IGCSE Chemistry.

Answer explanations

Question 1 of 18

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Paper 3 structured question: Air quality and climate

Paper 3Theory (Core)1 marks

Description

Composition of Clean, Dry Air

Clean, dry air is composed of approximately 78% nitrogen, 21% oxygen, and trace amounts of noble gases and carbon dioxide.

  1. a

    State the two most abundant gases in clean, dry air.

    [1]