Question

It is difficult to cook rice in an open vessel by boiling it at high altitudes because of

• A. low boiling point and high pressure
• B. high boiling point and low pressure
• C. low boiling point and low pressure
• D. high boiling point and high pressure

Answer 1

Answer: (C)

low boiling point and low pressure

Answer 2

At high altitude pressure is low and therefore boiling point is also low. In this case water starts boiling below its boiling point but rice cooks at $100^{\circ} C$. So, it is difficult to cook rice at high altitudes.