Question

State a reason why, when hydrogen is passed over heated Copper Oxide (CuO), the resultant product formed, differs in colour from the original reactant.

Answer 1

Hey.....☺

This happens as copper gets displaced by hydrogen from its oxide and copper and water forms as a result.

Colour of copper oxide is black which changes after the reaction as copper gets formed (reddish brown)

"Hydrogen is more reactive than copper "

.✌✌ Hope this helps .

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