Question

A reddish brown coloured metal, used in electric wires, when
powdered and heated strongly in an open china dish, its
colour turns black. When hydrogen gas is passed over this
| black substance, it regains its original colour. Based on the
above information answer the following questions.
i) Name the type of reaction takes place in each of the two
steps?
ii) Name the metal and black coloured substance formed.
iii) Write the balanced chemical for both reactions.​

Answer 1

Explanation:

Q.II) The metal is copper