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Question

Choose the correct statements regarding corrosion from the options given below.


  1. It is an electrochemical reaction.

  2. Occurs in the presence of atmospheric air and water vapour.

  3. Metals like sodium and potassium are less prone to corrosion.

  4. Metals like gold and silver are more prone to corrosion.


Solution

The correct options are
A

It is an electrochemical reaction.


B

Occurs in the presence of atmospheric air and water vapour.


Corrosion is a process of conversion of a metal into its compounds by continuous interaction with atmospheric air and water vapour. This is an electrochemical reaction in which metals lose electrons and oxygen accepts them. Metals like sodium and potassium which has high reactivity are more prone to corrosion than metals having low reactivity. Gold and silver do not react with oxygen and water at all, hence, these metals are less prone to corrosion.

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