Question

23. A shining metal 'X' on heating in air becomes black in colour. Namo
the black coloured compound formed and identify 'X'.

plz help me​

Answer 1

Explanation:

There are two properties of quadrilaterals: A quadrilateral should be closed shape with 4 sides. All the internal angles of a quadrilateral sum up to 360°

...

Parallelogram

Opposite angles are equal.

Opposite sides are equal and parallel.

Diagonals bisect each other.

Sum of any two adjacent angles is 180°

Answer 2

Explanation:

copper is oxidised into copper oxide

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