IGCSE Chemistry 0620/21/O/N/21 Q12

Question

12 Hydrogen is used as a fuel in rockets and is also used in hydrogen fuel cells.

Which statements are correct?

1 Both uses produce water vapour.
2 Burning hydrogen produces polluting gases.
3 A fuel cell produces electricity.

A 1, 2 and 3    B 1 and 3 only    C 1 only    D 2 and 3 only

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Answer ( 1 )

    0
    2022-05-11T10:53:59+08:00

    Hydrogen under combustion in oxygen produces water vapour.

    2 H2  +  O2  –>  2 H2O

    Ans: B (1 and 3 only)

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