Multiple choice

The boiling point of a liquid could be reduced by

  1. increasing the pressure

  2. decreasing the pressure

  3. addition of a solid of lower melting point

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The boiling point of a liquid is the temperature at which its vapor pressure equals the surrounding atmospheric pressure. By decreasing the external pressure, less vapor pressure is needed for the liquid to boil, thereby reducing its boiling point.