Multiple choice

The 'absolute zero of temperature' is

  1. the starting point of any scale of temperature

  2. the lowest temperature that is theoretically possible

  3. the temperature at which vapour of all liquid substances freeze

  4. the temperature at which all substances exist in the vapour phase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Absolute zero is defined as 0 Kelvin, the theoretical temperature at which all molecular motion ceases.

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