Read the following statements carefully:
Statement I: A pressure cooker operates by decreasing the pressure inside, which lowers the boiling point of water.
Statement II: Food cooks faster in a pressure cooker because the higher pressure allows water to boil at a temperature above 100°C.
Statement III: The superheated steam within the cooker increases the rate of heat transfer to the food, leading to faster cooking.
Which of the statements given above is/are correct?

Correct option is A

The correct answer is: (a) Only II and III are correct
Explanation:
· Statement I is wrong because a pressure cooker works by increasing the pressure inside, not decreasing it. This increases the boiling point of water.
· Statement II is correct – at higher pressure, water boils above 100°C (around 120°C), cooking food faster.
· Statement III is correct – superheated steam transfers heat efficiently to food, speeding up cooking.
Information Booster:
· Normal boiling point of water at 1 atm = 100°C.
· In a pressure cooker, boiling point rises to about 120°C at 15 psi pressure.
· Faster cooking saves time and fuel.
· Pressure cookers are common in households for energy-efficient cooking.
· Principle: Increase in pressure → Increase in boiling point.