Multiple choice

Which of the following instruments is used to measure the purity of milk?

  1. Lactometer

  2. Calorimeter

  3. Barometer

  4. Photometer
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A Correct answer
Explanation

A lactometer is specifically designed to measure the specific gravity of milk, which indicates its purity and detects adulteration (like added water). Calorimeters measure heat energy, barometers measure atmospheric pressure, and photometers measure light intensity.

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