1995 General Studies, all questions

UPSC Prelims 1995 · General Studies

Question 107: Science and Technology

The normal temperature of human body on the Kelvin scale is

a280
b290
c300
d310

AnswerThe answer is (d).

Normal body temperature is about 37 degrees Celsius. Kelvin is the SI unit of temperature and starts at absolute zero, minus 273 degrees Celsius, so a reading in kelvin is the Celsius reading plus 273: 37 + 273 = 310 K. The other options correspond to about 7, 17 and 27 degrees Celsius, far below body temperature. Remember: K = degrees C + 273.

Why each option is right or wrong
  • (a) 280 K is about 7 degrees Celsius.
  • (b) 290 K is about 17 degrees Celsius.
  • (c) 300 K is about 27 degrees Celsius, a warm room.
  • (d) Right: 37 + 273 = 310 K.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 1995, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.