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

(a) Internal pressure of the smaller bubble is higher than the internal pressure of the larger bubble

(b) Pressure of the larger bubble is higher than the smaller bubble

(c) Both bubbles have the same internal pressure

(d) None of the above

Concept Questions :-

Surface tension
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

If the excess pressure inside a soap bubble is balanced by oil column of height 2 mm, then the surface tension of soap solution will be (r = 1 cm and density d = 0.8 gm/cc)

(a) 3.9 N/m

(b)

(c)

(d) 3.9 dyne/m

Concept Questions :-

Surface tension
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

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

(a) Acute                   (b) Obtuse
(c) 90°                      (d) Zero

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

Two parallel glass plates are dipped partly in the liquid of density 'd' keeping them vertical. If the distance between the plates is 'x', surface tension for liquids is T and angle of contact is $\mathrm{\theta }$, then rise of liquid between the plates due to capillary will be

(a)                    (b)

(c)                 (d)

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by  force due to the weight of the liquid. If the surface tension of water is , the inner circumference of the capillary must be

(a)                     (b)

(c)                       (d)

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

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

(a) 2 : 3                           (b) 3 : 2
(c) 3 : 4                           (d) 4 : 3

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

A vessel, whose bottom has round holes with diameter of 0.1mm, is filled with water. The maximum height to which the water can be filled without leakage is
(S.T. of water =75 dyne/cm, g =1000 $\mathrm{cm}/{\mathrm{s}}^{2}$)

(a) 100 cm                          (b) 75 cm
(c) 50 cm                            (d) 30 cm

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

Water rise in a capillary tube when its one end is dipped vertically in it, is 3 cm. If the surface tension of water is , then the diameter of capillary will be

(a) 0.1 mm                          (b) 0.5 mm
(c) 1.0 mm                          (d) 2.0 mm

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

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 ?

(a) Zero                              (b) l+h
(c) 2h                                 (d) h

Concept Questions :-

Capillary rise
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:

If the surface tension of water is 0.06 ${\mathrm{Nm}}^{-1}$, then the capillary rise in a tube of diameter 1 mm is ( $\mathrm{\theta }$=0° )

(a) 1.22 cm                                (b) 2.44 cm
(c) 3.12 cm                                (d) 3.86 cm

Concept Questions :-

Capillary rise