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Question

Mercury is widely used in clinical thermometers because:

A
Mercury is cheap
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B
Mercury is clearly visible
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C
It is fashionable to use mercury
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D
Mercury has a constant coefficient of expansion
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Solution

The correct option is D Mercury has a constant coefficient of expansion
Mercury is widely used in clinical thermometers because, it expands uniformly at all temperatures, hence it can help us to measure the temperature accurately. Also it has a constant coefficient of expansion.

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