A shiny brown coloured element 'X' on heating in air becomes black in colour. Name the element 'X' and the black coloured compound formed.
Chemical Reaction
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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.

KnowledgeBoat · Accepted Answer

Element 'X ' is copper. On heating in air it forms Copper (II) oxide, which is black in colour. 2Cu (s) + O₂ (g) 2CuO (s)

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