Question

explained following balanced chemical reaction : hydrogen gas is passed over black copper oxide

Answer 1

It is known as a combination reaction. If hydrogen gas is made to pass over pre-heated copper oxide ( CuO ). As a result, the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained. So when hydrogen gas is passed over copper oxide copper is obtained.

Answer 2

It is known as a combination reaction. If hydrogen gas is made to pass over pre-heated copper oxide ( CuO ). As a result, the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained. So when hydrogen gas is passed over copper oxide copper is obtained.