The radii of two soap bubbles are r1 and r2 . In isothermal conditions, two meet together in a vacuum. Then the radius of the resultant bubble is given by

(1) R=(r1+r2)/2

(2) R=r1(r1r2+r2)

(3) R2=r12+r22 

(4) R=r1+r2

Subtopic:  Surface Tension |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

When a large bubble rises from the bottom of a lake to the surface, its radius doubles. If atmospheric pressure is equal to that of a column of water height H, then the depth of the lake is

(1) H

(2) 2H

(3) 7H

(4) 8H

Subtopic:  Pressure |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The excess pressure of one soap bubble is four times more than the other. Then the ratio of the volume of the first bubble to another one is 

(1) 1 : 64

(2) 1 : 4

(3) 64 : 1

(4) 1 : 2

Subtopic:  Surface Tension |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

There are two liquid drops of different radii. The excess pressure inside over the outside is 

(1) More in the big drop

(2) More in the small drop

(3) Equal in both drops

(4) There is no excess pressure inside the drops

Subtopic:  Surface Tension |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

If pressure at half the depth of a lake is equal to 2/3 pressure at the bottom of the lake then what is the depth of the lake

(1) 10m

(2) 20m

(3) 60m

(4) 30m

Subtopic:  Pressure |
 71%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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

(1) Equal to atmospheric

(2) Equal to upper side pressure

(3) More than upper side pressure

(4) Lesser than upper side pressure

Subtopic:  Capillary Rise |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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

Subtopic:  Surface Tension |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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

Subtopic:  Capillary Rise |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 the angle of contact is θ, then rise of liquid between the plates due to capillary will be 

(1) T cosθxd

(2) 2T cosθxdg

(3) 2T xdgcosθ

(4) T cosθxdg

Subtopic:  Capillary Rise |
 90%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75×10-4 N force due to the weight of the liquid. If the surface tension of water is 6×10-2 Nm-1, the inner circumference of the capillary must be:

1. 1.25×10-2 m 

2. 0.50×10-2 m

3. 6.5×10-2 m

4. 12.5×10-2 m

Subtopic:  Capillary Rise |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh