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Hydrometer and Lactometer

Give reasons ...

Question

Give reasons as to why the lower end of a hydrometer is filled with mercury or lead.

A

to lower its CG point

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B

to increase the height of its CG point

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C

to rotate in water

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D

to jump in water

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Solution

The correct option is A to lower its CG point
The lower end of a hydrometer is filled with mercury or lead in order to make it heavy so that it remains upright

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