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What is meant by corrosion?(i) Why do aluminium sheets not corrode easily.(ii) Why is copper vessel covered with a green coating in rainy season ? |
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Answer» (i) Slow eating of metals due to attack of atmospheric gases so as to convert the metal into its oxide, sulphide or carbonate etc. is called corrosion. (ii) A protective Iayer is formed on its surface to prevent it from corrosion (Al2O3) (iii) Formation of copper oxide on it from direct contact with air and moisture i.e., due to corrosion in Etectrolytic refining copper. |
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