Question

name and state the Principle used to check purity of milk by lactometer

Answer 1

Heyya!!!

Here is the answer
Archimedes' principle is used

Archimedes' principle state that an object immersed fully or partially in a liquid experiences an upward force that is equal to the weight of the fluid displaced by it.

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Answer 2

Archemedies principle

It works on the principle of specific gravity of milk (Archimede's Principle). It measures the relative density of milk with respect to water. If the specific gravity of a sample of milk is within the approved ranges, the milk is pure.