A shiny brown coloured element $^{'} X^{'}$ on heating in air becomes black in colour. Name the element $^{'} X^{'}$ and the black coloured compound formed.

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Solution

The shiny elements are metals. The brown coloured metal is copper. Hence $^{'} X^{'}$ is copper and the black coloured compound formed is Copper oxide. The reaction involved is:

$2 C u (s) + O_{2} (g) \to C u O (s)$

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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.

The shiny elements are metals. The brown coloured metal is copper. Hence ′X′ is copper and the black coloured compound formed is Copper oxide. The reaction involved is:2Cu(s)+O2(g)→CuO(s)

A shiny brown coloured element $^{'} X^{'}$ on heating in air becomes black in colour. Name the element $^{'} X^{'}$ and the black coloured compound formed.

The shiny elements are metals. The brown coloured metal is copper. Hence $^{'} X^{'}$ is copper and the black coloured compound formed is Copper oxide. The reaction involved is:

$2 C u (s) + O_{2} (g) \to C u O (s)$