Which of the following liquid is used as Cryogenic agent

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$K r$

$H e$

$N e$

$A r$

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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