IGCSE Chemistry 0620/21/O/N/21 Q32

Question

32 Lime (calcium oxide) is used to treat waste water from a factory.

Which substance is removed by the lime?

A ammonia
B sodium chloride
C sodium hydroxide
D sulfuric acid

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Answer ( 1 )

    0
    2022-05-12T16:53:26+08:00

    Lime (Calcium oxide) CaO + H2SO4 –> CaSO4 + H2O

    Ans: D sulfuric acid

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