Question

7. 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 type of chemical reactions occurring during both the changes.
(iii) Write the chemical equations of the reactions,​

Answer 1

X is copper and Y is copper oxide

The reaction is:

2Cu+O2(heat)=2CuO