There were two fixed points in the original Celsius scale as mentioned above which were assigned the number and respectively. On the absolute scale one of the fixed points is the triple-point of water, which on the kelvin absolute scale is assigned the number. What is the other fixed point on this (kelvin) scale?

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The other fixed point on the Kelvin scale is 0 K.

The other fixed point is absolute zero of temperature.

Both a and b

None of these

answer is C.

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Detailed Solution

Concept: There are upper and lower fixed points on the celsius scale. The fixed points are 100 degrees celsius up and 0 degrees celsius down.
The zero on the Kelvin scale is not arbitrary because it is indicative of the behaviour associated with all substances, unlike the zero on the Celsius scale, which depends on a property only associated with water. As a result, the Kelvin scale of temperature is thought to be superior to the Celsius scale.
So, The other fixed point is absolute zero of temperature.
Hence, option 3 is correct.

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