O LevelChemistryCambridge (CIE)Exam Questions10. Chemistry of the Environment10.3 Air Quality & Climate

Air Quality & Climate (Cambridge (CIE) O Level Chemistry): Exam Questions

Exam code: 5070

3 hours40 questions

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10.3 Air Quality & Climate

1a
2 marks

A student investigated the reaction of air with copper. 100 cm3 of air was passed continuously over heated copper using the apparatus below. When the volume remained constant, the apparatus was left to cool and the volume of gas was measured.

A horizontal tube containing copper turnings, with a graduated cylindrical vessel connected at each end by tubing. An empty labelling box points to the left-hand vessel

i) Complete the box to show the apparatus labelled.

[1]

ii) Indicate on the diagram, with an arrow, where heat is applied.

[1]

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1b
1 mark

What should be used to transfer the copper from a bottle to the apparatus?

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1c
1 mark

State the colour of the solid formed on the copper during the experiment.

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1d
2 marks

Why was the apparatus left to cool before measuring the final volume of gas?

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