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When copper powder is heated, it gets co...

When copper powder is heated, it gets coated with
Black copper oxide
Yellow copper oxide
Red copper oxide
Brown copper oxide

Answer

Step by step text solution for When copper powder is heated, it gets coated with <Br> Black copper oxide<Br> Yellow copper oxide<Br> Red copper oxide<Br> Brown copper oxide by CHEMISTRY experts to help you in doubts & scoring excellent marks in Class 12 exams.

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Hydrogen gas is passed over black copper oxide.

(a) Example the folloeing in terms of gain or loss of oxygen with one example each : (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

Knowledge Check

  • When copper turnings and concentrated HCl is heated with copper sulphate the compound formed is

    A
    Cupric chloride
    B
    Cuprous chloride
    C
    Copper sulphate
    D
    `SO_(2)`

  • In an experiment 2.16 g of copper was dissolved in nitric acid followed by ignition of the nitrate, which gave 2.70 g of copper oxide. In another experiment 1.46 g of copper on heating in a curent of air gave 1.83 g of copper. Oxide. The percentage of copper in copper oxide is _____________ and the abvoe data illustrate the law of ____________.

    A
    20 % definite proportion
    B
    80% multiple proportion
    C
    205 multiple proportion
    D
    805, definite proportion

  • What is the valency of copper in cuprous oxide?

    A
    4
    B
    3
    C
    2
    D
    1

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