VGO-0042
QUESTION
Semen straws are stored in liquid nitrogen is?
OPTIONS
(A) -79℃
(B) -100℃
(C) -196℃
(D) -270℃
ANSWER
(C) -196℃
EXPLANATION
At atmospheric pressure, liquid nitrogen is approximately -196 degrees Celsius, the standard temperature used for long-term storage of frozen semen straws. About -79 degrees Celsius corresponds to dry ice, while -100 degrees Celsius is warmer than liquid nitrogen. A temperature near -270 degrees Celsius approaches liquid-helium conditions and is not the routine semen-storage temperature.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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