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Which of the mentioned gas is used as protective atmosphere to prevent oxidation in metalworking and food preservation?

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Which of the mentioned gas is used as protective atmosphere to prevent oxidation in metalworking and food preservation?

(a) N2

(b) O2

(c) H2

(d) CO2

This question was posed to me in an international level competition.

The query is from Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology

1 Answer

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Best answer
Correct option is (a) N2

Easiest explanation: Nitrogen is used to prevent oxidation in metalworking and food preservation due to its inertness.

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