Question

On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?

Options

• On heating glass expands and the lid contracts

• On heating, the lid expands more than the neck and thus slides easily

• The neck becomes slippery on heating

• The lid of the bottle cannot bear the heat

Answer 1

On heating, the lid expands more than the neck and thus slides easily