Question

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A shiny brown coloured element
′X ′on heating in air becomes black in colour. Name the element ′ X ′and the black coloured compound formed.​

Answer 1

Explanation:

'X' is copper (Cu) and the black-coloured compound formed is copper oxide(CuO)

Answer 2

Explanation:

The brown coloured metal is copper. Hence ′X′ is copper and the black coloured compound formed is Copper oxide.