Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर
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Chemistry
Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर
Question Bank
Self Evaluation Test - Alcohols, Phenols and Ethers
question_answer
Arrange the following in increasing order of their acidity? [a] o-cresol, [b] salicylic acid, [c] phenol
A)\[c<a<b\]
B)\[b<c<a\]
C)\[a<b<a\]
D)\[a<c<b\]
Correct Answer:
D
Solution :
[d] Electron releasing groups \[(-C{{H}_{3}},-OC{{H}_{3}},-NC{{H}_{3}}etc)\] intensify the negative charge of phenoxide ion, i.e., destablises it hence decreases ionization of parent phenol, therefore decreases acidity. While electron withdrawing groups \[\left( -N{{O}_{2}}\text{,}-COOH,-CHO\text{ }etc. \right)\] increases acidity.