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Q. No.Given below are two statements:
Assertion (A):
To float, a body must displace liquid whose weight is greater than actual weight of the body.
Reason (R):
During floating the body will experience no net downward force in that case.
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.
Both (A) and (R) are false.
Subtopic: Â Archimedes' Principle |
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Given below are two statements:
| Assertion (A): | A ship floats higher in the water on a high-pressure day than on a low-pressure day. |
| Reason (R): | Floating of ship in the water is not possible because of buoyancy force which is present due to pressure difference. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Archimedes' Principle |
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Given below are two statements:
| Assertion (A): | A bubble comes from the bottom of a lake to the top. |
| Reason (R): | Its radius increases. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Pressure |
 63%
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Assertion: Bigger drops of liquid resist deforming forces better than the smaller drops.
Reason: Excess pressure inside the drop is directly proportional to its radius.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.
Reason: Excess pressure inside the drop is directly proportional to its radius.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.
Subtopic: Â Surface Tension |
 71%
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Given below are two statements:
| Assertion (A): | When two soap bubbles of different radii are brought into contact, the common interface of contact bulges into the bubble of larger radii. |
| Reason (R): | Pressure inside a soap bubble of a lesser radius is more than pressure inside the soap bubble of a larger radius. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Surface Tension |
 68%
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Given below are two statements:
| Assertion (A): | A spaceship while entering the earth's atmosphere is likely to catch fire. |
| Reason (R): | The temperature of the upper atmosphere is very high. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Stokes' Law |
 58%
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Given below are two statements:
| Assertion (A): | A thin stainless steel needle can lay floating on a still water surface. |
| Reason (R): | Any object floats when the buoyant force balances the weight of the object. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Surface Tension |
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Given below are two statements:
| Assertion (A): | The shape of a liquid drop is spherical. |
| Reason (R): | The pressure inside the drop is greater than that outside. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Surface Tension |
 59%
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Assertion: The velocity of a man jumping with a parachute first increases and then becomes constant.
Reason: The constant velocity of the fall of a man is called terminal velocity.
1. Both assertion and reason are true and reason is correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Reason: The constant velocity of the fall of a man is called terminal velocity.
1. Both assertion and reason are true and reason is correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Subtopic: Â Viscosity |
 64%
From NCERT
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Given below are two statements:
| Assertion (A): | At the critical temperature, the surface tension of a liquid becomes zero. |
| Reason (R): | At this temperature, intermolecular forces for liquids and gases become equal. Liquid can expand without any restriction. |
| 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. | Both (A) and (R) are false. |
Subtopic: Â Surface Tension |
 82%
From NCERT
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