Pure water can be made to boil at a temperature lower than 100°C by?

A. reducing its quantity
B. decreasing the external pressure
C. distilling it
D. increasing the external pressure

Correct Answer: Option B

B. decreasing the external pressure

Explanation

The easiest and most drastic way to change the boiling point is by tampering with the pressure above your water. To lower the boiling point, you need simply to decrease its external pressure.