Question

1.  Why is it advisable to use pressure cooker at higher altitudes?

Answer 1

A liquid boils when its vapour pressure equals the atmospheric pressure.

At higher altitude atmospheric pressure is lower than near the sea.

This causes the water to boil at a lower temperature (below 100), Due to this it takes longer time for food to be cooked.

A pressure cooker prevents boiling of water at lower temperature and leads to quicker cooking of the food.

Answer 2

Answer:

Explanation:

It is advisable to use pressure cooker at higher altitudes for cooking food because:

A liquid boils only when its vapour pressure is equal to the atmospheric pressure.  At high altitudes, the atmospheric pressure is very low.  This causes the water to boil at a lower temperature which will take a lot of time for food to be cooked.  A pressure cooker stops the boiling of water at lower temperature.

As a result, food cooks quickly.