Multiple choice

The corrosion of iron can be avoided by

  1. reacting it with dilute HCl

  2. reacting it with oxygen and water

  3. putting it in a solution of copper sulphate

  4. by coating iron with a layer of tin or chromium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coating iron with a less reactive or protective metal like tin or chromium prevents oxygen and moisture from reaching the iron surface, thereby preventing corrosion.

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