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Science Assertion & Reason

Acoustics · Tamil Nadu Board STD 10 (Tamil - English Medium). 2 questions.

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Assertion & Reason

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2 questions · timed · auto-graded

MCQ 11 Mark
Assertion: The velocity of sound increases with increase in humidity.
Reason: Velocity of sound does not depend upon the medium.

  • 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 reason is not the correct explanation of the assertion.
  • ✓
    Assertion is true but reason is false.
  • D
    Assertion is false but the reason is true.
Answer
Correct option: C.
Assertion is true but reason is false.
(c) The assertion is true but the reason is false.
Explanation: Velocity of sound increases with increase in humidity. The velocity of sound depends upon medium.
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MCQ 21 Mark
Assertion: Sound wave cannot propagate through a vacuum but light can.
Reason: Sound wave cannot be polarised but light can.

  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • ✓
    Both assertion and reason are true but the reason is not the correct explanation of the assertion.
  • C
    Assertion is true but the 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 the assertion.
(b) Both assertion and reason are true but the reason is not the correct explanation of the assertion.
Explanation: Sound waves, being mechanical waves, cannot travel through a vacuum. Light waves, electromagnetic waves, can travel through a vacuum.
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