Question

A shiny brown coloured element 'X' on heating in air becomes a black coloured compound . Name the element 'X' & black the coloured compound formed . Also write the equation.

Answer 1

Answer:The shinny brown colored element ‘X’ is copper. When it is heated in air, it becomes black due to the deposit of copper oxide.

2Cu(s)+O2(g)-------->2cuo

Heating