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Science Assertion & Reason

Forces and Pressure. · Tamil Nadu Board STD 8 (Tamil - English Medium). 8 questions.

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Assertion & Reason

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8 questions · timed · auto-graded

MCQ 11 Mark
Assertion : There is danger of a vehicle skidding on a wet road.
Reason : The tyres of the vehicle lose their grip on the road due to increase in friction due to presence of water on the road.
  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • ✓
    The assertion is true, but the reason is false.
  • D
    The assertion is false, but the reason is true.
Answer
Correct option: C.
The assertion is true, but the reason is false.
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MCQ 21 Mark
Assertion : We can live very happily if friction is not present in nature.
Reason : Aeroplane shape is streamlined to reduce the effort of frictional force.
  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • C
    The assertion is true, but the reason is false.
  • ✓
    The assertion is false, but the reason is true.
Answer
Correct option: D.
The assertion is false, but the reason is true.
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MCQ 31 Mark
Assertion : The pressure at the bottom of the sea is lesser than that near the surface.
Reason : The pressure exerted by a liquid depends upon the depth of the liquid and density of the liquid.
  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • C
    The assertion is true, but the reason is false.
  • ✓
    The assertion is false, but the reason is true.
Answer
Correct option: D.
The assertion is false, but the reason is true.
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MCQ 41 Mark
Assertion : Friction always opposes the motion.
Reason : Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • C
    The assertion is true, but the reason is false.
  • ✓
    The assertion is false, but the reason is true.
Answer
Correct option: D.
The assertion is false, but the reason is true.
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MCQ 51 Mark
Assertion : Force is defined as a push or pull acting on a body.
Reason : CGS unit of force is newton.
  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • ✓
    The assertion is true, but the reason is false.
  • D
    The assertion is false, but the reason is true.
Answer
Correct option: C.
The assertion is true, but the reason is false.
The assertion is true, but the reason is false
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MCQ 61 Mark
Consider the statement given below and choose the correct option.
Assertion: Water strider slides easily on the surface of the water.
Reason: Water strider experiences less buoyant force.
  • A
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • C
    Assertion is true, but reason is false.
  • D
    Both assertion and reason are false.
Answer
If both assertion and reason are true, but reason is not the correct explanation of assertion
Correct explanation:
It is due to the surface tension of water.
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MCQ 71 Mark
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
  • A
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • ✓
    Both assertion and reason are true, but the reason is not the correct explanation of assertion.
  • C
    Assertion is true, but reason is false.
  • D
    Both assertion and reason are false.
Answer
Correct option: B.
Both assertion and reason are true, but the reason is not the correct explanation of assertion.
Both assertion and reason are true, but the reason is not the correct explanation of assertion.
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MCQ 81 Mark
Consider the statement given below and choose the correct option.
Assertion: Sharp knives are used to cut the vegetables.
Reason: Sharp edges exert more pressure.
  • A
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but the reason is not the correct explanation of assertion.
  • C
    Assertion is true, but reason is false.
  • D
    Both assertion and reason are false.
Answer
Both assertion and reason are true and the reason is the correct explanation of the assertion
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Assertion & Reason - Science STD 8 Questions - Vidyadip