NEETChemistryCarboxylic Acid Derivatives
Match the following Column-1 Acid Column-2 pKa value A) CH 3 COOH I) 0 . 23 B) F 3 CCOOH II) 3 . 41 C) III) 4 . 19 D) IV) 4 . 76 The correct match is
Options
- AA B C D IV. I III II
- BA B C D I IV. II III
- CA B C D IV I. II III
- DA B C D IV III II I
Correct answer
A. A B C D IV. I III II
Step-by-step solution
The acidity of carboxylic acid is directly proportional to the acid dissociation constant. But it is inversely proportional to the pK a value because the pK a is equal to the - logK a . So, the order of acidity of given acids depends upon the - M , - I effect. It is directly proportional to the - M , - I effect. The acetic acid is least acidic. So, it has the pK a value of 4 . 76 . After that acidity of benzoic acid. So, it has the pK a value of 4 . 19 . After that acidity of p - nitrobenzoic acid. So, it has the p