Question

The purity of milk is measured by
1. Barometer
2. Lactometer
3. Thermometer
4. Fathometer

Answer 1

Correct Answer - Option 2 : Lactometer

The correct answer is lactometer.

• The purity of milk is measured by a lactometer.
  • Lactometer works on Archimedes’ principle.
  • It measures the relative density of milk with respect to water.
• The sourness of the milk is due to the presence of lactic acid.
• Human beings feel tired due to the accumulation of lactic acid in the muscles.

• A barometer is used to measure air pressure.
• A Thermometer is used to measure temperature.
• A fathometer is used to measure the depth of the ocean.