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Why is nitrogen preferably used in welding process and cooling of substances?

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in Chemistry – Class 12 by (188k points)
Why is nitrogen preferably used in welding process and cooling of substances?

(a) It’s a gas and can easily be handled

(b) It has an extremely low freezing point

(c) It is an inert gas

(d) It is non-toxic

I got this question by my college professor while I was bunking the class.

The query is from P-Block Elements in division P-Block Elements of Chemistry – Class 12

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Correct choice is (c) It is an inert gas

Easy explanation: Gases like argon is also nontoxic. However, nitrogen gas is still the most preferred since it eliminates all the possibilities of unwanted oxidation and explosions. In the welding industry this prevents metals from corroding. Nitrogen is used in the food industry for packaging since it provides a pressurized atmosphere that reduces package collapse.

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