The increasing order of pK a for the following phenols is (A) 2,4-Dinitrophenol (B) 4-Nitrophenol (C) 2,4,5-Trimethylphenol (D) Phenol (E) 3-Chlorophenol Choose the correct answer from the option given below :

Question

The increasing order of pK a for the following phenols is (A) 2,4-Dinitrophenol (B) 4-Nitrophenol (C) 2,4,5-Trimethylphenol (D) Phenol (E) 3-Chlorophenol Choose the correct answer from the option given below :, (A), (E), (B), (D), (C), (A), (B), (E), (D), (C), (C), (D), (E), (B), (A), (C), (E), (D), (B), (A)

MARKS App · Accepted Answer

Order of acidity for following phenol is Increasing order of pK a means most acidic will be placed first. - M groups at ortho and para position increases acidic strength in phenol. Hence, (A) is most acidic. + M , Hyperconjugation, + I decreases K a Value of 2,4,5-Trimethylphenol. Hence (C), is least acidity. So, the order of pK a value is (A)

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