A reddish brown metal is heated in the presence of oxygen forms a black compound. on heating the black compound with hydrogen gas , we get back the metal.what are the metal and compound

Md Ariful Islam

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Reddish brown metal is copper (Cu). When copper is heated in the presence of oxygen, it forms copper(II) oxide (CuO) - the black compound. Copper (II) oxide can be reduced to metal by heating with hydrogen gas: CuO + H2 = Cu + H2O
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