Question

A shiny brown coloured element X on heating in air becomes black in colour . Name the element X & the black coloured compound formed.

Answer 1

Hey

The required metal is copper ( Cu ) .

It's colour is brown .

When it reacts with oxygen , it forms copper oxide ( CuO ) .

The colour of CuO is black .

So , the element X is Copper ( Cu )

thanks :)

Answer 2

element X is Copper (Cu)
black compound formed is Copper oxide (CuO)