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'. 1.Name the substance 'X' and 'Y'. 2.Name the chemical process occurring during both the changes.
3.Write the chemical equation involved in both the changes.

Answer 1

Answer:

1. x is copper

y is copper oxide

2 oxidation

and redox.

Explanation:

3 brown substance =x=copper

while heating with air turns to copper oxide (black colour)

Cu+O2>CuO this is oxidation

CuO +H2>Cu +H2 here redox reaction takes place here CuO is reduced to cu and h2 is oxidised into h2o

thank u