In Birkeland-Eyde process, the raw material used is

Air

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NH₃

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NO₂

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HNO₃

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Solution

The correct option is A
Air

Birkeland - Eyde process

Dinitrogen is prepared commercially from air by liquification and fractional distillation. When liquid air is allowed to distil, dinitrogen having lower b.pt (77K) distils over first leaving behind liquid oxygen (bpt 90K). World wide production of dinitrogen from liquid air is more than 50 million tonns per year.

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