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". Name the substance 'X' and 'Y'.
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If the substance X is brown in colour, it should be copper.
Under the presence of oxygen, copper forms copper oxide. The reaction is as follows:
2Cu+ O2-> 2CuO
Therefore the substance Y is called as copper oxide.
In addition when copper oxide is exposed to hydrogen, the metal oxide is reduced to copper and the hydrogen combines with oxygen to form water.
Under the presence of oxygen, copper forms copper oxide. The reaction is as follows:
2Cu+ O2-> 2CuO
Therefore the substance Y is called as copper oxide.
In addition when copper oxide is exposed to hydrogen, the metal oxide is reduced to copper and the hydrogen combines with oxygen to form water.
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