A liquid film is formed in a loop of area 0.05 m2. Increase in its potential energy will be (T = 0.2 N/m)

(a) 5×10-2 J              (b) 2×10-2 J

(c) 3×10-2 J               (d) None of these

Concept Questions :-

Surface tension
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In order to float a ring of area 0.04 m2 in a liquid of surface tension 75 N/m, the required surface energy will be

(a) 3 J                   (b) 6.5 J
(c) 1.5 J                 (d) 4 J

Concept Questions :-

Surface tension
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


If two soap bubbles of equal radii r coalesce then the radius of curvature of interface between two bubbles will be

(a) r                                  (b) 0
(c) Infinity                         (d) 1/2r

Concept Questions :-

Surface tension
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


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

(a) Increases

(b) Decreases

(c) Remains the same

(d) First increases and then decreases

Concept Questions :-

Surface tension
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The angle of contact between glass and mercury is

(a) 0°                                     (b) 30°
(c) 90°                                   (d) 135°

Concept Questions :-

Surface tension
Please attempt this question first.

Difficulty Level:


A mercury drop does not spread on a glass plate because the angle of contact between glass and mercury is

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

Concept Questions :-

Surface tension
Please attempt this question first.

Difficulty Level:


The liquid meniscus in the capillary tube will be convex if the angle of contact is

(a) Greater than 90°                                 (b) Less than 90°
(c) Equal to 90°                                  (d) Equal to 0°

Concept Questions :-

Capillary rise
Please attempt this question first.

Difficulty Level:


The value of contact angle for kerosene with solid surface.
(a) 0°                                     (b) 90°
(c) 45°                                   (d) 33° 

Concept Questions :-

Surface tension
Please attempt this question first.

Difficulty Level:


Nature of meniscus for liquid of 00 angle of contact

(a) Plane                               (b) Parabolic
(c) Semi-spherical                  (d) Cylindrical

Concept Questions :-

Surface tension
Please attempt this question first.

Difficulty Level:


A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long tube is 
(a) Flat                                 (b) Concave
(c) Convex                            (d) Cylindrical

Concept Questions :-

Surface tension
Please attempt this question first.

Difficulty Level: