JEE MAIN - Chemistry (2024 - 31st January Morning Shift - No. 18)
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: $$\mathrm{pK}_{\mathrm{a}}$$ value of phenol is 10.0 while that of ethanol is 15.9 .
Reason R: Ethanol is stronger acid than phenol.
In the light of the above statements, choose the correct answer from the options given below:
A is false but R is true.
Both $$A$$ and $$R$$ are true but $$R$$ is NOT the correct explanation of $$A$$.
Both $$\mathrm{A}$$ and $$\mathrm{R}$$ are true and $$\mathrm{R}$$ is the correct explanation of $$\mathrm{A}$$.
$$A$$ is true but $$R$$ is false.
Explanation
Phenol is more acidic than ethanol because conjugate base of phenoxide is more stable than ethoxide.
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