Question

Water boils at 120 °C in a pressure cooker. Explain the reason

Answer 1

• The boiling point of a liquid increases with the increase in pressure and decreases with the decrease in pressure.
• The boiling point of pure water at one atmospheric pressure (= 760 mm of Hg) is 100 °C.
• In a pressure cooker, the water boils at about 120 °C to 125 °C due to increase in pressure, as the steam is not allowed to escape out of it.