Question

A shiny brown coloured element on heating in air forms a black coloured oxide. Name the element​

Answer 1

Copper oxide is the correct answer

Answer 2

Explanation:

copper oxide

Copper is the brown coloured element X which on heating in air becomes black coloured compound copper oxide.

copper (Cu) and the black-coloured compound formed is copper oxide(CuO). The equation of the reaction involved on heating copper is given below:

(Shinybrownincolour)

2Cu+O2->Heat (Blackincolour)2CuO

Hope this helps mate ☺️.