Allied & ICAR Exam Bank • ALLIED_0739 NAT • 2 Marks

Section 7: Dairy and Food Engineering

Refrigeration and Freezing

Subtopic: Refrigeration and Freezing

Question Statement:

In cryogenic food freezing using liquid nitrogen at atmospheric pressure, the boiling temperature of liquid nitrogen in $^\circ\text{C}$ is approximately:

Answer Key:

-196

Step-by-Step Solution & Explanation

Liquid nitrogen boils at $-195.8^\circ\text{C}$ (approx. $-196^\circ\text{C}$ or $77\text{ K}$).
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