Question

A reddish brown coloured metal, used in electrical 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 informatio

n answer the following questions. (i) Name the metal and the black coloured substance

formed. (ii) Write balanced chemical equations for both the reactions.

Answer 1

HEYA MATE !!!
HERE'S YOUR ANSWER...

The element is Copper.

ACC/to Case 1)...
Cu + O2 ----> CuO
name of black coloured substance = Copper oxide.

ACC/to case 2)...
CuO + H2 ------> Cu + H2O