Q10 · CSIR NET Chemistry, December 2019
Paper: CSIR NET December 2019 · Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Acidity Basicity · Marks: 2 · Difficulty: Hard
The correct order of basicity of the following compounds is $\mathrm{CH_2NO_2^{\ominus}}$ (A) $\mathrm{{}^{\ominus}CH_2CN}$ (B) 
(C) 
(D)
(C) (D)(a)$\mathrm{B}>\mathrm{A}>\mathrm{C}>\mathrm{D}$
(b)$\mathrm{D}>\mathrm{B}>\mathrm{C}>\mathrm{A}$
(c)$\mathrm{C}>\mathrm{D}>\mathrm{B}>\mathrm{A}$
(d)$\mathrm{B}>\mathrm{A}>\mathrm{D}>\mathrm{C}$
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Conjugate-acid pKa values: CH₃CN ~31 (B), CH₃NO₂ ~10 (A), p-nitrobenzoic acid 3.4 (D), picric acid 0.4 (C). Basicity B > A > D > C (d).
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