Assertion :Temperature below $0^{0} C$ are possible in Celsius scale but in Kelvin scale, negative temperature is not possible. Reason: The Kelvin scale is related to Celsius scale as follows : K = $^{0} C$ - 273.15.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
The Kelvin scale is related to Celsius scale as follows: K = 0 $^{\circ}$ C +273.15
Therefore, temperature below 0 $^{\circ}$ C is possible in Celsius scale but in Kelvin scale, negative temperature is not possible because below $0$ K atoms would stop moving means they do not possess energy. And since mass and energy are related no energy means no mass.

Thus assertion is correct but the reason is incorrect
Option C is correct

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