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 to X.
1) name the substance X and Y.
2) write the chemical equation involved in both the changes​

Answer 1

Explanation:

x is copper and the compound y is copper oxide.

2Cu + O2 gives 2CuO

CuO +H2 gives Cu + H2O

Answer 2

1. brown substance is Cu ( X )
2. Y substance is CuO
3. CuO + h2 = Cu + h2o.

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