Question

The freezing of biotechnology products like vaccines require ________ freezing system. i) Helium ii) Nitrogen iii) Ammonia iv) ChlorineTNSCERT Class 10 Physics Ch 15 Laws of Motivation and Gravitation

Answer 1

The freezing of biotechnology products require Nitrogen freezing system.
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ii)Nitrogen.
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Answer 2

ii) Nitrogen is the answer....