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________ is used to measure the pressures of gases.
1. Hygrometer
2. Fathometer
3. Manometer
4. Vernier Callipers

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Correct Answer - Option 3 : Manometer

The correct answer is Manometer.

  • Manometer
    • It is used to measure the pressure of gases.
    • The pressure is measured in units of force per unit of surface area.
    • The manometer is placed against a measuring scale to allow any difference in the height which is used to make relative comparisons between test pressures.

Scientific Instruments Uses
Hygrometer to measures the humidity of the air
Fathometer to measures the depth of the ocean 
Vernier Callipers to measures lengths accurately

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