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Q: Which instrument is used for measuring density of milk?
  • A. Hydrometer
  • B. Lactometer
  • C. Barometer
  • D. Thermometer
Correct Answer: Option B - A lactometer is an instrument that is used to check the purity of milk by measuring its density. The lactometer works on the principle of specific gravity of milk.
B. A lactometer is an instrument that is used to check the purity of milk by measuring its density. The lactometer works on the principle of specific gravity of milk.

Explanations:

A lactometer is an instrument that is used to check the purity of milk by measuring its density. The lactometer works on the principle of specific gravity of milk.