Question

what happen when hydrogen gas is passed over hot copper (II) oxide?​

Answer 1

Answer:

When hydrogen gas is passed over heated copper oxide, then the black copper oxide is reduced and brown copper metal is obtained

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Answer 2

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1)Copper==>>When hydrogen gas is passed over heated copper oxide, then the black copper oxide is reduced and brown copper metal is obtained.

2) Oxide==>>When hydrogen gas is passed over heated copper oxide, then the black copper oxide is reduced and brown copper metal is obtained.