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Science Assertion & Reason

Acids and Bases. · Tamil Nadu Board STD 8 (Tamil - English Medium). 4 questions.

Questions

Assertion & Reason

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4 questions · timed · auto-graded

MCQ 11 Mark
Assertion: Methyl orange and phenolphthalein are natural indicators.
Reason: Methyl orange is yellow in colour while phenolphthalein is pink.
  • A
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • C
    The assertion is true, but reason is false.
  • ✓
    Both assertion and reason are false.
Answer
Correct option: D.
Both assertion and reason are false.
Both assertion and reason are false.
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MCQ 21 Mark
Assertion: With some samples of acids and bases, turmeric paper turns red.
Reason: Such samples are acidic in nature.
  • A
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • ✓
    The assertion is true, but reason is false.
  • D
    The assertion is false, but reason is true.
Answer
Correct option: C.
The assertion is true, but reason is false.
Assertion is true, but reason is false.
Correct Reason:
Such samples are basic in natural.
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MCQ 31 Mark
Assertion: A salt is produced when an acid is neutralised by a base.
Reason: A salt can be acidic, basic or neutral.
  • A
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • ✓
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • C
    The assertion is true, but reason is false.
  • D
    The assertion is false, but reason is true.
Answer
Correct option: B.
Both assertion and reason are true, but reason is not the correct explanation of assertion.
Both assertion and reason are true, but reason is not the correct explanation of assertion.
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MCQ 41 Mark
Assertion: To neutralise the excess acid formed in the stomach, milk of magnesia is taken.
Reason: Milk of magnesia contains a base called magnesium hydroxide.
  • ✓
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true, but reason is not the correct explanation of assertion.
  • C
    The assertion is true, but reason is false.
  • D
    The assertion is false, but reason is true.
Answer
Correct option: A.
Both assertion and reason are true and the reason is the correct explanation of assertion.
Both assertion and reason are true and the reason is the correct explanation of assertion.
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Assertion & Reason - Science STD 8 Questions - Vidyadip