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Question

How do we find out the quantity of water added to milk?


A

Sphygmomanometer

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B

Lactometer

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C

Dynamometer

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D

Thermometer

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Solution

The correct option is B

Lactometer


A lactometer is an instrument that is used to check for the purity of milk by measuring its density. It finds out the content of the water in the milk to test the quality of the milk. When placed in a glass of milk, if the lactometer floats, it means it's pure and if the lactometer sinks, it means it's adultered with water.


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