Question

Q.1) 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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Answer 1

Answer:

X= copper & the black coloured compound is copper oxide

Explanation:

Copper + uv Ray =copper oxide

Answer 2

Answer:

'X' is copper (Cu) and the black-coloured compound formed is copper oxide(CuO).

Explanation:

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