Question

Which of the following is NOT a characteristic of the liquid used in a manometer?
1. The liquid should stick on the walls
2. High viscosity
3. Low surface tension
4. It should be immiscible

Answer 1

Correct Answer - Option 2 : High viscosity

Explanation:

• For amplifying the deflection in a liquid column manometer, liquids with greater density could be used or one of the limbs of the manometer may be inclined.
• Commonly used manometric liquids are mercury, water, or alcohol.
• Some of the important and desirable properties of the manometric liquids are:

1. High chemical stability
2. Low viscosity
3. Low capillary constant
4. Low coefficient of thermal expansion
5. Low volatility
6. Low vapour pressure
7. Low surface tension
8. Sticky to wall
9. Immiscible