Question

It takes much longer to cook food in the hills than in the plains, because

• A. in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than ${100}^{o}C$ causing an increase in cooking time
• B. due to low atmospheric pressure on the hills, the water boils at a temperature higher than ${100}^{o}C$ and therefore water takes longer to boil
• C. in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
• D. in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking

Answer 1

The correct option is A in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than ${100}^{o}C$ causing an increase in cooking time

Since decrease in air pressure causes decrease in boiling temperature, because of which it takes more time to cook at hilly areas or high altitudes.