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SI UNIT OF TEMPERATURE

Why is Kelvin considered as SI unit of temperature?

 Answer: From kinetic theory of matter , it is understood that the average kinetic energy of molecule is directly proportional to the  temperature in Kelvin. When the temperature in this scale is zero then the molecular motion ceases irrespective of nature of any substance. This can be taken as the starting temperature . Hence Kelvin scale is taken as an absolute scale and hence SI unit.
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