Question

a shiny brown coloured element x on heating in air becomes black name the element X and the black colour compound formed.
Now when H2 gas is passed over this black compound what is observed ?write the equation. dont write irrelevant answers or else I will report​

Answer 1

Answer:

Cu +O2=CuO

Explanation:

cuo is black in colour

Answer 2

Answer:

Cu+O2=CuO

Explanation:

Cu black in colour