Liquid Nitrogen boils at

A. 77 kelvin

B. 82 Kelvin

C. 54 kelvin

D. 97 Kelvin

Answer: Option A

Solution(By Examveda Team)

Liquid nitrogen is very cold! At normal atmospheric pressure, nitrogen is a liquid between 63 K and 77.2 K (-346°F and -320.44°F). Over this temperature range, liquid nitrogen looks much like boiling water. Below 63 K, it freezes into solid nitrogen. Because liquid nitrogen in a usual setting is boiling, its usual temperature is 77 K.