Question

17. A shiny brown coloured element 'X' on heating in air becomes black in colour. Name the elemen
'X' and the black coloured compound formed.
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Answer 1

Copper is brown in colour element turns black on heating.

Answer 2

ANSWER======>

ELEMENT X ===== Copper

BLACK COMPOUND===== Copper oxide

REACTION involved======>

heat

2Cu + O2 -----------> 2CuO(copper oxide)

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