Question

When Hydrogen gas is passed over heated copper (II) oxide, copper and steam are formed. Write the balanced chemical equation with physical states for this reaction. State what kind of chemical reaction is this ?

CBSE Class X Science SA 1 ( 2 marks)

Answer 1

When Hydrogen gas is passed over the heated copper oxide, both steam and copper are formed.

The balanced chemical equation with the physical state for this reaction is given below.

Cu O (s) + H2 (g) ===> heat ==> Cu (s) + H2O (g).

It is the oxidation redoc reaction of the reduction reaction. I

n this process, Hydrogen is oxidized and Cu is reduced.

Answer 2

CuO+H↑2 heated ― Cu+H↓2O is formed