Science and Technology
2021
Everyday Science

In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?

  1. Area of the hole in the lid
  2. Temperature of the flame
  3. Weight of the lid Select the correct answer using the code given below.

B.2 and 3 only
D.1, 2 and 3
A.1 and 2 only
C.1 and 3 only

Correct Answer: Option C

In a pressure cooker, the boiling point of water is elevated due to increased pressure, which speeds up cooking.

The key factors influencing the cooking temperature are:

  1. Area of the hole in the lid: This affects the rate at which steam escapes, thus influencing the pressure inside the cooker.
  2. Weight of the lid: A heavier lid requires a higher pressure to lift and release steam, leading to a higher cooking temperature.

The temperature of the flame primarily affects how quickly the pressure builds up, but the maximum temperature is determined by the pressure inside the cooker.

Think of cooking on hills: at higher altitudes, lower atmospheric pressure reduces the boiling point of water, making cooking more difficult.

Statement 1 is correct. Statement 3 is correct. Statement 2 is incorrect. Hence, option c is correct.