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Mechanical Properties of Fluids
Mercury is used as a thermometric liquid because of the following reasons:
(i) it has low heat capacity,
(ii) it has constant value of temperature coefficient of expansion,
(iii) it has high melting point and low freezing point,
(iv) it is good conductor of heat,
(v) it does not stick with glass, and
(vi) it is less volatile and hence has very low vapour pressure
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