The absolute zero, i.e., temperature below which is not achievable, is

The absolute zero, i.e., temperature below which is not achievable, is about:

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0 °C

–273 K

–273 °C

–300 °C

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC NDA-2 – 2015

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Absolute zero, the theoretical lowest possible temperature, is approximately -273 °C.

Absolute zero is defined as 0 Kelvin (0 K). The Kelvin temperature scale is directly related to the Celsius scale by the formula K = °C + 273.15. Therefore, 0 K is equal to -273.15 °C. The option -273 °C is the closest approximation among the choices.

At absolute zero, particles theoretically cease all fundamental motion. According to the third law of thermodynamics, absolute zero is unattainable in any physical system, although temperatures very close to it have been achieved experimentally.

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