Question

when the power of a common metal is heated in an open China dish its colour turns black however when hydrogen is passed over the whole black substance so form it regains its original colour based on the above information answer the following questions
(i) what type of chemical reaction takes place in each of the two given steps
(ii) name the mental initially taken in the powder form write balance chemical equations for both reactions​

Answer 1

Answer:

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Answer 2

Answer:

The balanced chemical reaction is,

This is a oxidation reaction where oxygen is gained by the copper metal. step 2 : When hydrogen is passed over the hot black substance that is , it regains its original color and form copper as a metal.

Explanation:

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