21. Yg of copper powder was taken in a China dish and heated. What change takes place on heating? When Kydrogen is passed over this heated substance, a visible change is seen in it. Give thechendcal equations of reactions.

21. Yg of copper powder was taken in a China dish and heated. What cha

1.	21. Yg of copper powder was taken in a China dish and heated. What change takes place on heating? When Kydrogen is passed over this heated substance, a visible change is seen in it. Give thechendcal equations of reactions.
Answer» AnswerWhen 1G of copper powder is taken in a china dish and heated, a BLACK coloured SUBSTANCE is formed. This substance is copper oxide.(Red brown)2Cu + (From air)O 2 Heat (Black)2CuO The copper gets oxidized to copper oxide.When hydrogen gas is PASSED over this heated substance, CuO, copper metal is obtained. The black-coloured CuO is reduced and brown colour CU metal is produced.(Black)CuO + (Hydrogen gas)H 2 ⟶ BrownCu(s) +H 2 O(l)

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21. Yg of copper powder was taken in a China dish and heated. What change takes place on heating? When Kydrogen is passed over this heated substance, a visible change is seen in it. Give thechendcal equations of reactions.​

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21. Yg of copper powder was taken in a China dish and heated. What change takes place on heating? When Kydrogen is passed over this heated substance, a visible change is seen in it. Give thechendcal equations of reactions.