Question:
The order of basic strength of following amines is: (i) \( CH_3NH_2 \) (ii) \( (C_2H_5)_2NH \) (iii) \( C_6H_5NH_2 \) (iv) \( C_6H_5NHCH_3 \)
The order of basic strength of following amines is: (i) \( CH_3NH_2 \) (ii) \( (C_2H_5)_2NH \) (iii) \( C_6H_5NH_2 \) (iv) \( C_6H_5NHCH_3 \)
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Resonance reduces availability of lone pair → lowers basicity.
Updated On: Apr 21, 2026
- (ii) < (i) < (iv) < (iii)
- (iii) < (iv) < (ii) < (i)
- (i) < (iii) < (iv) < (ii)
- (i) < (ii) < (iii) < (iv)
- (iii) < (iv) < (i) < (ii)
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The Correct Option is
Solution and Explanation
Concept:
Aliphatic amines > aromatic amines in basicity.
Step 1: Reason.
Aromatic amines less basic due to resonance. \[ C_6H_5NH_2<C_6H_5NHCH_3<CH_3NH_2<(C_2H_5)_2NH \]
Step 1: Reason.
Aromatic amines less basic due to resonance. \[ C_6H_5NH_2<C_6H_5NHCH_3<CH_3NH_2<(C_2H_5)_2NH \]
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