Alcohols Phenols And Ethers Ques 32

32. Which one of the following compounds is most acidic?

[2005]

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Answer:

Correct Answer: 32.(c)

Solution:

(c) Phenols are more acidic than alcohols as they are resonance stabilised whereas alcohols are not.

Further $-NO_2$ is an electron withdrawing group which increases acidic character and facilitates release of proton, whereas $-CH_3$ is an electron donating group which decreases acidic character, thus removal of $H^{+}$becomes difficult.