Question

Mercury cannot be used to measure very low temperature instead alcohol is used find out why
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Answer 1

Mercury expands on heating not in lower temperature

Answer 2

Answer:

We cannot use mercury thermometer at low temperatures because: ... Heat does not flow from the body whose measurement we are taking with the thermometer.

Explanation:

Instead we can use Alchohol. At low temperatures mercury becomes transparent and it becomes difficult to take the readings.

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