Question

A shiny coloured element X on heating it becomes black in colour . Name the element X and the black coloured compound formed?

Answer 1

the shiny brown element x is copper.the black coloured compound formed is copper oxide
cu+o2---------------cuo

Answer 2

Heya !!!


shining colour element is copper

when the copper is exposed to air IT form black colour oxide that is metal oxide of copper.


that is :- CuO


here is reaction :-


2 Cu + O2 ===> 2CuO .


the element X is copper


the black coloured compound form is copper oxide which is generally black in colour.



note :- copper oxide is oxide of metal so it is basic in nature.




hope it helps you dear !!


thanks !!!