What is Absolute Zero in Celsius?

Absolute Zero is defined as the lowest possible temperature where molecular motion is minimized. In the Celsius scale, this temperature is equivalent to -273.15 degrees Celsius. However, when rounding to two decimal places, it is often represented as -273.16 degrees Celsius due to variations in temperature definitions and calculations. Thus, the choice of -273.16 C aligns closely with the scientific consensus regarding the temperature at which all thermal motion ceases.

In contrast, the other provided options represent temperatures that do not correspond to Absolute Zero. A temperature of 0 C is the freezing point of water, not close to Absolute Zero. The temperature of 273.16 C is far above it, while -456.69 C is also an incorrect representation since it is much lower than Absolute Zero. Thus, the choice of -273.16 C accurately reflects the theoretical limit of absolute temperature on the Celsius scale.