A glass bottle containing water tightly corked breaks when it is kept in freezer, because -

In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because –

Food gets cooked faster in a pressure cooker because

When soggy biscuits are kept inside the fridge for sometime they become crisp because :

On a day when I am in hurry to go to office, I have a fixed quantity of rice which was just cooked and kept in a bowl. In order to cool it quickly, which one of the following is the best option?

When a glass rod is placed in steam, its length increases but its width :