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Question

Hydrometers are used to serve what purpose?

A
For determining density of liquid
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B
Pressure measurement
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C
Viscosity measurement
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D
None of the above
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Solution

The correct option is A For determining density of liquid
Answer is A
A hydrometer is an instrument used to measure the specific gravity (relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. A hydrometer is usually made of glass and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright

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