WBJEE · Chemistry · Carboxylic Acid Derivatives
What is the correct order of acidity of salicylic acid, 4-hydroxybenzoic acid, and \(2,6-\) dihydroxybenzoic acid?
- A 2,6-dihydroxybenzoic acid > salicylic acid > 4-hydroxybenzoic acid
- B 2,6-dihydroxybenzoic acid > 4-hydroxybenzoic acid > salicylic acid
- C salicylic acid > 2, 6-dihydroxybenzoic acid > 4-hydroxybenzoic acid
- D salicylic acid > 4-hydroxybenzoic acid > 2,6-dihydroxybenzoic acid
Answer & Solution
Correct Answer
(A) 2,6-dihydroxybenzoic acid > salicylic acid > 4-hydroxybenzoic acid
Step-by-step Solution
Detailed explanation
The conjugate base of 2, 6-dihydroxybenzoic acid is highly stabilised by \(\mathrm{H}\)-bonding. The effect is lesser in salicyclic acid.
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