Question

a shiny brown colured element 'X' and heating in air becomes black in color Name the element 'X' and the black cloured compound formed

Answer 1

X is copper.It becomes black due to deposition of copper oxide.

Hope it helps.

Answer 2

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Note:-The shiny brown element X is copper and the compound is copper (II) oxide. Copper, when heated in air forms copper (II) oxide (chemical formula CuO), which is black in colour. 







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