Question

when the Powder of a command metal is heated in an open China dish it's colour turns black . however , when hydrogen is passed over the hot black substance so formed , it regains its original colour . what type of chemical reaction takes place in each of the two given steps? name the metal initially taken in the powder form . write balance chemical equations for both reactions​

Answer 1

Answer:

the metal is copper

when it is heated it becomes copper oxide

it is a oxidation reaction

when hydrogen is passed it becomes copper again

it is a reduction

copper colour is brown

2Cu+O2=CuO

CuO+H2=Cu+H20

Answer 2

Answer:

sorry#

Explanation: