Question

A reddish brown coloured metal ,used in electrical wires,when powdered and heated strongly in an open China dish , it's colors turns black . When hydrogen gas is passed over this black substance , it regains it's original cilour . Based on the above information answer the following questions.
1) . Name the metal and the black coloured substance formed.
2). Write the balance chemical equation for both the reactions.

Answer 1

● The reddish brown metal is copper( Cu). The black coloured substance formed is cupric oxide( CuO).


● 2Cu + O2 = 2CuO
CuO + H2 = Cu + H20

Answer 2

Answer:

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