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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Copper is a shiny, brown-colored metal that is often used in electrical wiring and other applications. When heated in air, copper reacts with oxygen to form a black-colored compound called copper oxide (CuO). Copper oxide is a solid, black-colored substance that is often used as a pigment in paints, inks, and other products.
Here is the chemical reaction that occurs when copper is heated in air:
Cu + O2 → CuO
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