When a thermometer is brought in contact with a hot body, the liquid inside it_________.

expands

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changes its colour

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contracts

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changes its mass

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Solution

The correct option is A
expands

When the thermometer is brought in contact with a hot body, heat is transferred to it, due to which an increase in the volume of the mercury is observed.

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A phenomenon in which a substance expands and changes its shape is called:

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