Capillary Action

Q.

When a capillary tube is placed in mercury, we see that__

1. the level of mercury falls

2. the level of mercury rises rapidly.

3. the level of mercury first rises then falls

4. the level of mercury rises slowly

Q.

With the increase in temperature, the level of water

1. decreases in a capillary tube.

2. increases rapidly in a capillary tube.

3. first increases and then decreases in a capillary tube.

4. increases slowly in a capillary tube.

Q.

The water from roots of plant reaches to the stem and other parts of the plant through

1. capillary action

2. surface tension

3. None of these

4. upthrust

Q.

Which one is not an example of Capillary action?

1. Ploughing the field

2. Absorption of ink in a blotting paper

3. Floating of wood on the surface of water

4. Rise of oil in the wick of a lamp

Q.

The tendency of a liquid in a tube or absorbent material to rise or fall as a result of surface tension is called

1. Buoyancy

2. None of these

3. Capillary action

4. Viscosity

Q. For which of the two pairs, the angle of contact is same

1. Silver and water; mercury and glass
2. Silver and chromium; water and chromium
3. Pure water and glass; glass and alcohol
4. Water and glass; glass and mercury

Q. A vertical glass capillary tube, open at both ends, contains some water. Which of the following shapes may not be taken by the water in the tube?
(IIT-JEE 2007)

1. 
2. 
3. 
4. 

Q.

Capillary action is caused by the combination of cohesive forces of the liquid and the adhesive forces between the liquid and tube material.

1. Obtuse

2. Acute

Q.

When the temperature is increased the angle of contact of a liquid

1. Increases

2. Decreases

3. First increases and then decreases

4. Remains the same

Q.

It is relatively easy to write on blotting paper or newspaper with an ink pen because of

1. Because of viscosity

2. Because of inertia

3. Because of friction

4. Because of capillarity