Question

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.

Answer 1

Answer:

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