When a container's metal lid is stuck, we put it in hot water for a while and then it becomes easier to open it. Why is it so?

The hot water cleans it.

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The hot water will polish the metal.

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The heat expands the metal.

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The heat contracts the metal.

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Solution

The correct option is C The heat expands the metal.
Metals expand on heating and on losing heat, they contract. So when we keep the container in hot water for a while, the metal lid expands and thus makes it easier for us to open it.

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When a container's metal lid is stuck, we put it in hot water for a while and then it becomes easier to open it. Why is it so?

The correct option is C The heat expands the metal.Metals expand on heating and on losing heat, they contract. So when we keep the container in hot water for a while, the metal lid expands and thus makes it easier for us to open it.

The correct option is C The heat expands the metal.
Metals expand on heating and on losing heat, they contract. So when we keep the container in hot water for a while, the metal lid expands and thus makes it easier for us to open it.