Question

Water boils at ${120}^{o}C$ in a presure cooker. Explain the reason.

Answer 1

The boiling point of a liquid increases with an increase in pressure and vice-versa. In a pressure cooker, steam is not allowed to escape out. The vapour pressure on water inside becomes nearly 1.75 times the atmospheric pressure, so water boils at about ${120}^{o}C$.