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What is the boiling point of nitrogen?

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What is the boiling point of nitrogen?

(a) 20.27

(b) 27.09

(c) 77.36

(d) 111.7

I had been asked this question in a job interview.

The question is from Cryogenics, Hot and Cold Working of Metals in portion Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

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Correct option is (c) 77.36

The explanation is: Cryogenics refers to the study and production of materials under low temperatures. The boiling points of cryogenic fluids like hydrogen, neon, nitrogen, and methane are 20.27K, 27.09K, 77.36K, and 111.7K in that order.

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