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Why does not copper liberate hydrogen fr...

Why does not copper liberate hydrogen from acids. ?

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Copper placed below hydrogen in the electrochemical series. It is not in a position to release electrons to `H^(+)` ions of the acid. Therefore, hydrogen gas is not evolved.
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Knowledge Check

  • Which of the following metals does not liberate hydrogen from acids?

    A
    Fe
    B
    Cu
    C
    Mg
    D
    Zn

  • A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. The metal M is

    A
    zinc
    B
    iron
    C
    copper
    D
    aluminium

  • A metal X does not liberate hydrogen from acids but reacts with oxygen to give a black coloured product. Metal X and the black coloured product could be respectively

    A
    silver and silver sulphide
    B
    copper and copper oxide
    C
    iron and iron oxide
    D
    aluminium and aluminium oxide.

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    Why does copper not replace hydrogen from acids ?

    A metal M does not liberate hydrogen from acids but reacts with oxygen Q 5 to give a black colour product. Identify M and black coloured produCt and also explain the reaction of M with oxygen.

    Name two metals which do not liberate hydrogen from acids .

    Name two metals which do not liberate hydrogen from acids.

    Iron exposed to moist air for a long time does not liberate hydrogen gas from dilute acids like HCI and H_2SO_4 .Explain.

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