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Question
Which among the following has highest basic strength?
Options
Methanamine
Ethanamine
Propan-2-amine
Phenylmethanamine
MCQ
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Solution
Ethanamine
Explanation:
Smaller the pKb value, stronger is the base.
| Amine | Structural formula | pKb value |
| Methanamine | CH3 − NH2 | 3.38 |
| Ethanamine | CH3 − CH2 − NH2 | 3.29 |
| Propan-2-amine | (CH3)2 − CH − NH2 | 3.40 |
| Phenylmethanamine |  |
4.70 |
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