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Q.

Which of the following liquid is used as Cryogenic agent

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a

Kr

b

He

c

Ne

d

Ar

answer is A.

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Detailed Solution

Helium acts as a cryogenic agent for carrying out experiments at low temperature because it acts as a coolant as helium is the coldest substance. Helium is mixed with oxygen in the gas cylinder of a scuba diver because of the very low solubility of helium in the bloodstream of a Scuba diver.

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