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Science CBSE Homework Assignments
Class 7
Physical and chemical changes
Rusting and changes
2.
Rusting
Task:
3
m.
Explain how painting of an iron gate prevents it from rusting.
Rusting is assisted by both
moisture
vapour
(water) and
vapour
air
(oxygen). By painting an iron gate, we prevent its contact with the air and moisture present in the
troposphere
atmosphere
. Therefore, rusting is prevented.
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