Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour
Shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.
Answer :
Copper is a brown coloured shiny element, when heated in air, it becomes black in colour.
$$ 2Cu + O_{2} + Heat \rightarrow 2CuO $$
Hence, the element ‘X’ is copper and black coloured compound formed is copper oxide.