Question

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.

Answer 1

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.