Question

A device used to check the purity of milk is called

• A. Lactometer
• B. Hydrometer
• C. Speedometer
• D. Barometer

Answer 1

The correct option is A

Lactometer

The explanation for the correct option:

Option A: Lactometer

1. The device used to check the purity of milk is Lactometer.
2. It gives the relative density of the milk so that we can compare the density of milk with respect to the water.
3. It works on the Archimedes principle.

The explanation for the incorrect options:

Option B: Hydrometer

A hydrometer is used to determine the density or relative density of liquid based on buoyancy.

Option C: Speedometer

Speedometer measures and displays the speed of the vehicle at that instance.

Option D: Barometer

The barometer is used to measure atmospheric pressure.

Hence, the correct answer is Option A.