Question

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Answer 1

Answer:

it's not visible clearly dear

Explanation:

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Answer 2

Answer:

1) we paint iron in order to prevent it from rusting.

2) nitrogen gas is filled in packets containing oil and fats because nitrogen is less reactive than other gases, so it prevents yhe food from getting oxidized.

3) what are the (a) and (b) you mentioned?

Hope it helps..

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