Phenols are more acidic than aliphatic alcohols. Given below are two statements marked Assertion…
Assertion: Phenols are more acidic than aliphatic alcohols.
Reason: Phenoxide ion is stabilised by resonance but alkoxide ion is not stabilised by resonance.
Given below are two statements marked Assertion and Reason. Read the two statements carefully and select the correct option.
- (a)Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
- (b)Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
- (c)Assertion is true and Reason is false.
- (d)Both Assertion and Reason are false.
Answer
Answer
AIWritten by AI (gemini) - it can contain mistakes.
Correct option: (a)
The Assertion is true because phenols have a lower $pK_a$ than aliphatic alcohols. The Reason is also true because the negative charge on the phenoxide ion is delocalized over the benzene ring through resonance, whereas the alkoxide ion has no resonance stabilization. The Reason is the correct explanation for the Assertion.
Answer: (a) Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
From ISC 2026 Chemistry Paper 1, question 1(B)(vi).