Question:
Which of the following has the highest basic strength?
Which of the following has the highest basic strength?
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In water: 2° amine > 1° amine > 3° amine.
Updated On: May 4, 2026
- Trimethyl amine
- Dimethyl amine
- Methylamine
- Ammonia
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The Correct Option is B
Solution and Explanation
Concept:
Basic strength of amines in aqueous solution depends on:
• +I effect of alkyl groups
• Solvation of the protonated amine
Step 1: Order in aqueous solution. \[ \text{Secondary amine} > \text{Primary amine} > \text{Tertiary amine} > \text{NH}_3 \]
Step 2: Reason.
• Secondary amines have strong +I effect and good solvation
• Tertiary amines suffer from steric hindrance → less solvation
Step 3: Conclusion. \[ \text{Dimethyl amine is the strongest base} \]
Basic strength of amines in aqueous solution depends on:
• +I effect of alkyl groups
• Solvation of the protonated amine
Step 1: Order in aqueous solution. \[ \text{Secondary amine} > \text{Primary amine} > \text{Tertiary amine} > \text{NH}_3 \]
Step 2: Reason.
• Secondary amines have strong +I effect and good solvation
• Tertiary amines suffer from steric hindrance → less solvation
Step 3: Conclusion. \[ \text{Dimethyl amine is the strongest base} \]
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