when the Powder of a command metal is heated in an open China dish it's colour turns black . however , when hydrogen is passed over the hot black substance so formed , it regains its original colour . what type of chemical reaction takes place in each of the two given steps? name the metal initially taken in the powder form . write balance chemical equations for both reactions
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the metal is copper
when it is heated it becomes copper oxide
it is a oxidation reaction
when hydrogen is passed it becomes copper again
it is a reduction
copper colour is brown
2Cu+O2=CuO
CuO+H2=Cu+H20
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sorry#
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