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The absolute zero temperature is 0 Kelvin. In °C unit, which one of th

June 1, 2025 by rawan239

The absolute zero temperature is 0 Kelvin. In °C unit, which one of the following is the absolute zero temperature?

0 °C

-100 °C

-273·15 °C

-173·15 °C

This question was previously asked in

UPSC NDA-2 – 2018

Download PDF Attempt Online

The correct answer is -273.15 °C.

Absolute zero is defined as 0 Kelvin (0 K). The relationship between the Celsius scale (°C) and the Kelvin scale (K) is given by the formula T(K) = T(°C) + 273.15.

To convert 0 Kelvin to degrees Celsius, we rearrange the formula: T(°C) = T(K) – 273.15. Substituting T(K) = 0, we get T(°C) = 0 – 273.15 = -273.15 °C. Absolute zero is the theoretical point where particles have minimum vibration and zero point energy, and it is the lowest possible temperature.

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