Question

what is mean by hydrometer for testing milk and what is difference between hydrometer and lactometer​

Answer 1

Hydrometer is used to check the density of a liquid while lactometer determines the purity of milk.

Answer 2

Answer:

the meaning of hydrometer is

A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water.