1g of copper powder was taken in a china dish and heated. What change takes place on heating?When hydrogen gas is passed over the heated substance, a visible change is observed.Write the chemical equation involved and the name and colour of the compounds formed.
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Explanation:
When the powder of a common metal is heated in an open china dish, its colour turns black. However, when hydrogen is passed over the hot black substance so formed, it regains its original colour
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