Kiran bought a small statue which turned green after few months. What will be the reason for the colour change?
A
Corrosion of iron
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B
Corrosion of tin
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C
Corrosion of copper
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D
Corrosion of silver
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Solution
The correct option is C Corrosion of copper The process which involves the degradation of metals like iron, copper and silver in the presence of air and moisture is called corrosion. Green coating of copper carbonate is formed due to corrosion of copper. Black layer of silver sulphide is formed due to corrosion of silver.
Since the colour of statue turned green it should have been due to corrosion of copper.