Statement I: The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well. [2023]

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

Q.
Given below are two statements:

Statement I: The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well.

Statement II: The rise of a liquid in a capillary tube does not depend on the inner radius of the tube.

In the light of the above statements, choose the correct answer from the options given below: [2023]

1 Statement I is false but Statement II is true.

2 Both Statement I and Statement II are false.

3 Both Statement I and Statement II are true.

4 Statement I is true but Statement II is false.

Ans.
(4)

Statement I is correct as we know contact angle depends on cohesive and adhesive forces.

Statement II is incorrect because height of liquid is given by $h = \frac{2 T \cos θ}{ρ g r}$ where $r$ is the radius of the tube (assuming the length of the capillary is sufficient).

Solution

1 Statement I is false but Statement II is true.

2 Both Statement I and Statement II are false.

3 Both Statement I and Statement II are true.

4 Statement I is true but Statement II is false.

Ans.
(4)

Statement I is correct as we know contact angle depends on cohesive and adhesive forces.

Statement II is incorrect because height of liquid is given by $h = \frac{2 T \cos θ}{ρ g r}$ where $r$ is the radius of the tube (assuming the length of the capillary is sufficient).

Want Us to Email you About Special Offers & Updates?

Solution

1 Statement I is false but Statement II is true.

2 Both Statement I and Statement II are false.

3 Both Statement I and Statement II are true.

4 Statement I is true but Statement II is false.

Ans. (4) Statement I is correct as we know contact angle depends on cohesive and adhesive forces. Statement II is incorrect because height of liquid is given by h=2Tcosθρgr where r is the radius of the tube (assuming the length of the capillary is sufficient).

Want Us to Email you About Special Offers & Updates?

Ans.
(4)

Statement I is correct as we know contact angle depends on cohesive and adhesive forces.

Statement II is incorrect because height of liquid is given by $h = \frac{2 T \cos θ}{ρ g r}$ where $r$ is the radius of the tube (assuming the length of the capillary is sufficient).