IGCSE Chemistry 0620/21/O/N/21 Q30


30 Which statements about the Haber process are correct?

1 One of the raw materials is extracted from liquid air by fractional distillation.
2 One of the raw materials is produced by the reaction of steam and methane.
3 The catalyst for the Haber process is vanadium(V) oxide.

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

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Answer ( 1 )


    Haber process is an industrial process to prepare ammonia gas. Steps are as follows:

    1. Nitrogen gas is obtained from fractional distillation of liquid air.
    2. Hydrogen gas is obtained as water gas through: CH4 + H2O –> 3H2 + CO // C + H2O –> H2 + CO
    3. Nitrogen gas and hydrogen gas mixed together in ratio of 1:3 under pressure of 200atm, 450-500 degree Celsius with iron as catalyst: N2 + 3H2 <=> 2NH3

    Among options 1, 2 and 3 in the question, 3 is false because Vanadium (V) oxide is only used in Contact process.

    Ans: 1 and 2 only

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