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Question

At what temperature on the Kelvin scale does liquid nitrogen boil? (Its boiling point is 196C.)
  1. 469 K
  2. 237 K
  3. 330 K
  4. 77 K


Solution

The correct option is D 77 K
The relation between Celsius and Kelvin scale is as follows
0C=273K
To convert a temperature in Celsius scale to Kelvin scale we have to add 273 to the given temperature.
The boiling point of nitrogen  is 196C.
On Kelvin scale, 
196C = -196 + 273
= 77K

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