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

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asked Feb 7, 2018 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1272

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

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answered Feb 7, 2018 by mdsamim (213,225 points) ● 5 ● 10 ● 22
edited Feb 24, 2018 by faiz
 
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Element ‘X’ is copper (Cu). 

Black coloured compound formed is copper (II) oxide (CuO).

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