A pressure cooker reduces cooking time for food because

A pressure cooker reduces cooking time for food because
  1. boiling point of water involved in cooking is increased
  2. the higher pressure inside the cooker crushes the food material
  3. cooking involves chemical changes helped by a rise in temperature
  4. heat is more evenly distributed in the cooking space

Solution

On increasing pressure, the temperature is also increased. Thus in pressure cooker due to increase in pressure the b.p. of water increases.

Asked in: JEE Main 2003

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