Question

A person living in Shimla observed that cooking food without using pressure cooker takes more time. The reason for this observation is that at high altitude

(a) pressure increases (b) temperature decreases

(c) pressure decreases (d) temperature increases

Answer 1

The pressure at the top of a mountain [or at high altitude] is low. This suggests that boiling takes place at a lower temperature, due to which things take more time to boil.

However, in a pressure cooker, the pressure is increased and hence, boiling point increases. Thus, things come to boil in a pressure cooker in a less period of time.