A shiny brown coloured element x on heating in air becomes black in colour. The black coloured compound when heated with hydrogen gives back the element x. Name the element x and the black coloured compound formed. Write balanced chemical equations for the reactions.
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Answer:
a shiny brown colored compound is copper, when heated change into copper oxide. the black compound heated with hydrogen gives back the eliment copper.
Explanation:
the reaction is 2Cup+ O ^2 2CuO
heated with hydrogen. Cuo +H^2 Cu.+H^2O.
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