Why black coating on the surface of copper oxide turns brown when hydrogen gas is passed over heated copper oxide

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Solution

When hydrogen is passed over heated copper oxide it forms hydrogen peroxide, which is an antochlor, that is it removes the black coatings of the oxide layer.
2CuO + H₂ -------> 2Cu + H₂O₂

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Why black coating on the surface of copper oxide turns brown when hydrogen gas is passed over heated copper oxide

When hydrogen is passed over heated copper oxide it forms hydrogen peroxide, which is an antochlor, that is it removes the black coatings of the oxide layer. 2CuO + H2 -------> 2Cu + H2O2

When hydrogen is passed over heated copper oxide it forms hydrogen peroxide, which is an antochlor, that is it removes the black coatings of the oxide layer.
2CuO + H₂ -------> 2Cu + H₂O₂