Question

A shiny brown coloured element 'x' on heating in air become black in colour Name the element 'x' and the black coloured compound formed?​

Answer 1

Heya mate....

Here is your answer ...

• A shiny brown element 'X' is COPPER, which on heating in air ( presence of oxygen), gives a black coloured compound of COPPER OXIDE as one of its product.

• The overall balanced reaction is :-->

2Cu ( copper ) + O2 ( oxygen present in atmosphere) ------------> 2CuO ( black coloured compound).

• Hence ,

X = COPPER

Black coloured compound = Copper oxide.

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thanks