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UPSC 1998: Assertion (A): Formic acid is a stronger acid than acetic acid. Reason (R): Formic acid is an organic acid.
(a)Both A and R are true, and R is the correct explanation of A
(b)Both A and R are true, but R is NOT a correct explanation of A
(c)A is true, but R is false
(d)A is false, but R is true
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Not attemptedCorrect Answer: (b) Both A and R are true, but R is NOT a correct explanation of A
Formic acid (pKa ≈ 3.75) is a stronger acid than acetic acid (pKa ≈ 4.76) because the electron-donating methyl group in acetic acid destabilises its conjugate base, not simply because both are ‘organic’. Hence A and R are true, but R does not explain A. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-topic-wise-questions-chemistry-some-important-organic-compounds/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1998 Science & Technology question?▼
The correct answer is option (b): Both A and R are true, but R is NOT a correct explanation of A. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Chemistry question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 127. It falls under Science & Technology > Chemistry.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Chemistry?▼
UPSC has asked 53 questions from Chemistry (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.