O-LevelChemistryChemistry of the Environment5070/11 · May/June 2021 · Q161 Mark

These statements refer to hydrogen and its use as a fuel. 1 Both water and hydrocarbons can be used as a source of hydrogen. 2 In a fuel cell hydrogen reacts with oxygen to generate electricity. 3 The reaction taking place in a fuel cell is a redox reaction. Which statements are correct?

A1 and 2 only

B1 and 3 only

C2 and 3 only

D1, 2 and 3

✓ Correct answer

D: 1, 2 and 3

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2021 Paper 1 Variant 1, question 16.

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