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A shining brown coloured element "X" on heating in air becomes black in colour. Name the element 'X' and black colour compound formed?
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A shining brown coloured element "X" on heating in air becomes black i...
The shinny brown colored element ‘X’ is copper. When it is heated in air, it becomes black due to the deposit of copper oxide.

2Cu + O2--->2CuO
(brown) (black)
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A shining brown coloured element "X" on heating in air becomes black i...



Identifying the Element 'X' and the Compound Formed:

Element 'X':
- The element 'X' in this scenario is most likely copper.

Compound Formed:
- When copper (element 'X') is heated in air, it reacts with oxygen to form copper oxide, which is black in color.

Explanation:
- When copper is heated in the presence of oxygen, it undergoes oxidation to form copper oxide (CuO). This reaction is represented by the equation: 2Cu + O2 → 2CuO.
- Copper oxide is a black colored compound due to the presence of copper in the +2 oxidation state.
- This change in color from brown to black is a result of the formation of copper oxide on the surface of the copper metal during the heating process.

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A shining brown coloured element "X" on heating in air becomes black in colour. Name the element 'X' and black colour compound formed?
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