. Water boils at 120 °C in a pressure cooker

Best Answer

The boiling point of liquid increases with the increase in pressure and decreases with the decrease in pressure. At one atmospheric pressure, the boiling point of pure water is 100⁰ C. In a pressure cooker, steam is not allowed to escape out. The vapour pressure on water inside the cooker becomes nearly 1.75 times the atmospheric pressure. Thus water boils at about 120⁰ C to 125⁰ C due to increase in pressure.