Question

Why does water boil below ${100}^o$C at higher altitudes?

• A. Pollution-free air at higher altitudes increases the calorific value of fuel used
• B. Water available at higher altitudes is purer than that in the plains
• C. There is lesser dissipation of heat at higher altitudes
• D. The atmospheric pressure at higher altitudes is low as compared to that at sea level

Answer 1

The correct option is D The atmospheric pressure at higher altitudes is low as compared to that at sea level

As the atmospheric pressure is low at higher altitudes is compared to that sea level which causes decrease in boiling point as pressure is inversely proportional the temperature. So, water does boil below ${100}^{\circ }C$ at higher altitude