Question

a brown substance 'x' on heating in air forms a substance 'y'.when hydrogen is passed over heated 'y',it again changes back into x. 1) name the substance 'x' and 'y'. 2)write the chemical equation​

Answer 1

Answer:

When hydrogen gas is passed over heated Y, it again changes back into X. Name the substance X and Y. The substance X is copper. On heating in air, it forms copper oxide Y