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Solution


Q.

From the following select the one which is not an example of corrosion.                [2024]
1 Rusting of iron object  
2 Production of hydrogen by electrolysis of water  
3 Tarnishing of silver  
4 Development of green coating on copper and bronze ornaments  

Ans.

(2)

Corrosion slowly coats the surfaces of metallic objects with oxides or other salts of the metal. The rusting of iron, tarnishing of silver, development of green coating on copper and bronze ornaments are some of the examples of corrosion.