Question

2. Why do we use Mercury in the
thermometer? Can water be used instead
of Mercury? What are the problems in
using it

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Answer 1

Answer:

Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids . If water is used in a thermometer , it will start phase change at 0°c and 100 °c

and will not measure temperature , out of this range . This range is very small as compared to other liquids as mercury , having freezing point about −39 °C and boiling point 356°c