A 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 regain its original colour .(a)name the metal and black coloured substance formed (b)write balanced chemical equation for both the reactions
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Answer:
Metal is Copper (Cu) and black substance is copper oxide CuO
Explanation:
2Cu + O2 ----> 2CuO
CuO + H2 -----> Cu + H2O
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