Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

Clean dry air is made up mostly of nitrogen and oxygen.
(a)[2]

Name two additional gases present in clean dry air.

(b)[6]

Air commonly contains pollutants. Identify three widespread gaseous pollutants in air and state how each one is produced.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “carbon dioxide gas” …

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