The correct order of pKa for the following compounds is (I) (II) (III) (IV) · ABC26OR0787
Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Acidity Basicity · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
The correct order of pKa for the following compounds is (I) 
(II) 
(III) 
(IV) 
(II) (III) (IV) (a)II $>$ I $>$ III $>$ IV
(b)II $>$ I $>$ IV $>$ III
(c)III $>$ IV $>$ I $>$ II
(d)IV $>$ II $>$ I $>$ III
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
pKa: 4-(dimethylamino)phenol ≈ 10.3 (II) > phenol 10.0 (I) > acetic acid 4.76 (IV) > 4-nitrobenzoic acid 3.4 (III) (b).
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