Question

A brown substance ‘x' on heating in air forms a substance ‘y'. When hydrogen gas is passed over heated ‘y', it again changes back into ‘x'. I. Name the substances x and y ii. Name the chemical processes occurring during both the changes. Iii. Write the chemical equations

Answer 1

Explanation:

1. substance x is copper

substance y is copper oxide

2. oxidation is being occurred

3. cu +O --- cuO

cuO +H2 --- cu + H2O