Complete the following sentences :
A pressure cooker is based on the principle that boiling point of water increases with the …..........................

Explanation

To complete the sentence, we need to understand the relationship between pressure and the boiling point of water. Here's the step-by-step solution:

1. **Understanding Boiling Point**: The boiling point of a liquid is the temperature at which its vapor pressure equals the external pressure surrounding the liquid.

2. **Effect of Pressure**: When the external pressure increases, the boiling point of the liquid also increases. This is because a higher pressure requires the liquid to reach a higher temperature for its vapor pressure to match the external pressure.

3. **Application in Pressure Cookers**: A pressure cooker works by sealing the cooking environment, which increases the pressure inside the cooker. As a result, the boiling point of water inside the cooker is raised above the normal boiling point of 100°C (at 1 atm pressure).

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