Multiple choice

Which of the following gases remains liquid at -880C?

  1. ethane and methane

  2. ethane and propane

  3. propane and butane

  4. butane and ethane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Propane (boiling point -42°C) and butane (boiling point -0.5°C) both remain liquid at -88°C since this temperature is well below their boiling points. Methane would be gaseous at -88°C as its boiling point is -161.5°C, and ethane boils at -88.6°C, so it would be transitioning between states at this temperature.

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