Q. No.The spherical shape of raindrop is due to:
| 1. | the density of the liquid | 2. | the surface tension |
| 3. | the atmospheric pressure | 4. | gravity |
Subtopic: Surface Tension |
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Level 1: 80%+
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Pressure inside a soap bubble is greater than the pressure outside by an amount : (Given : R = Radius of bubble, S = Surface tension of bubble)
1. 4R/S
2. 4S/R
3. 2S/R
4. S/R
Subtopic: Surface Tension |
91%
Level 1: 80%+
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The wettability of a surface by a liquid depends primarily on:
| 1. | surface tension. |
| 2. | density. |
| 3. | angle of contact between the surface and the liquid. |
| 4. | viscosity. |
Subtopic: Surface Tension |
87%
Level 1: 80%+
AIPMT - 2013
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A liquid film is formed in a loop of area 0.05 . Increase in its potential energy will be (T = 0.2 N/m)
1.
2.
3.
4. None of these
Subtopic: Surface Tension |
87%
Level 1: 80%+
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When the ends of a glass tube are heated, they gradually become spherical in shape. This phenomenon occurs due to:
1. tension
2. surface tension
3. pressure
4. gravity
1. tension
2. surface tension
3. pressure
4. gravity
Subtopic: Surface Tension |
86%
Level 1: 80%+
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A liquid film is formed in a loop of area 0.05 . Increase in its potential energy will be (T = 0.2 N/m)
1.
2.
3.
4. None of these
Subtopic: Surface Tension |
86%
Level 1: 80%+
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The excess pressure inside a soap bubble is thrice the excess pressure inside a second soap bubble. The ratio between the volume of the first and the second bubble is:
1. \(1:81\)
2. \(1:9\)
3. \(1:27\)
4. \(1:3\)
Subtopic: Surface Tension |
86%
Level 1: 80%+
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The surface tension of liquid is 0.5 N/m. If a film is held on a ring of area 0.02 , its surface energy is
1.
2.
3.
4.
Subtopic: Surface Tension |
85%
Level 1: 80%+
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The surface tension of liquid is 0.5 N/m. If a film is held on a ring of area 0.02 , its surface energy is
1.
2.
3.
4.
Subtopic: Surface Tension |
85%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Clothes containing oil or grease stains cannot be cleaned by water wash |
| Reason (R): | Because the angle of contact between the oil/grease and water is obtuse. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Surface Tension |
84%
Level 1: 80%+
JEE
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