Question

9. Explain how painting of an iron gate prevents it from rusting.
Explain why rusting of iron objects is faster in coastal areas than in deserts
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Answer 1

Answer:

For rusting, iron must be in contact with both air and moisture: When iron gate is painted, the layer of paint prevents the contact of iron with air and moisture and so there is no rusting.

The important components for rusting are iron, oxygen, and moisture. In coastal areas, the content of moisture in the air is high, so the process of rusting is faster.

Answer 2

We know that for rusting, the presence of both oxygen and water (water vapour) is essential. Thus, in coastal areas, the air contains high moisture which means more humid environment and rusting becomes faster. Whereas in deserts, moisture in air is less, hence rusting of iron is very slow there.

not sure about it