reddish brown coloured metal, used in electrical wires when powered and heated strongly in an open china dish, its colour turns black. When hydrogen gas is passed over this black substance it regains its original colour. Based on the above information answer the following questions(i) Name the metal and black coloured substance formed.(ii) Write balanced chemical equations for both the reactions. *
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The reddish brown coloured metal is copper metal (Cu). When copper metal is heated in air, it forms black coloured compound. This black coloured compound is copper oxide or copper (II) oxide (CuO).
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i) The reddish brown coloured metal is copper metal (Cu). When copper metal is heated in air, it forms black coloured compound. This black coloured compound is copper oxide or copper (II) oxide (CuO)
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