In a capillary tube, pressure below the curved surface of the water will be:

1.	equal to atmospheric pressure.
2.	equal to upper side pressure.
3.	more than upper side pressure.
4.	lesser than upper side pressure.

Two bubbles A and B are joined through a narrow tube where bubble A is bigger. Then 

1. The size of A will increase

2. The size of B will increase

3. The size of B will increase until the pressure equals

4. None of these

Two soap bubbles have different radii but their surface tension is the same. Mark the correct statement

1. Internal pressure of the smaller bubble is higher than the internal pressure of the larger bubble

2. Pressure of the larger bubble is higher than the smaller bubble

3. Both bubbles have the same internal pressure

4. None of the above

Due to capillary action, a liquid will rise in a tube, if the angle of contact is 

1. Acute                   

2. Obtuse

3. 90°                     

4. Zero

Two capillary tubes P and Q are dipped in water. The height of water level in capillary P is 2/3 to the height in Q capillary. The ratio of their diameters is

1. 2 : 3                         

2. 3 : 2

3. 3 : 4                         

4. 4 : 3

By inserting a capillary tube upto a depth l in water, the water rises to a height h ( h<l). If the lower end of the capillary is closed inside water and the capillary is taken out and closed end opened, to what height the water will remain in the tube ?

1. Zero                             

2. l+h 

3. 2h                               

4. h

If the surface tension of water is \(0.06~\text{N/m}^2,\) then the capillary rise in a tube of diameter \(1~\text{mm}\) is:
\((\theta = 0^{\circ})\)

1. \(1.22~\text {m}\)
2. \(2.44~\text {cm}\)
3. \(3.12~\text {cm}\)
4. \(3.86~\text {cm}\) 

If the capillary experiment is performed in a vacuum, then for a liquid the capillary will:

If liquid level falls in a capillary then radius of capillary will

1. Increase                     

2. Decrease

3. Unchanged                 

4. None of these

Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne/cm respectively Ratio of heights of liquids in the two tubes $\frac{{\mathrm{h}}_1}{{\mathrm{h}}_2}$ is

1. $\frac{10}{9}$                     

2. $\frac{3}{10}$

3. $\frac{10}{3}$                   

4. $\frac{9}{10}$