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(a) The objects made up of iron need to be painted to prevent corrosion on the iron objects.
(b) To avoid oxidation that can affect the freshness, colour and smell of food, nitrogen gas is filled in packets containing oil and fats.
(c) The process responsible for a is corrosion and for b is oxidation
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cheating ....
ok done write fast......
answer. no.1 only and sorry
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