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The most basic amine among the following is
Options
(a) p-toluidine
(b) o-nitroaniline
(c) p-nitroaniline
(d) 2,4-dinitroaniline
Correct Answer:
p-toluidine
Explanation:
Basicity of amines increases with the presence of electron releasing groups and decreases with the presence of electron withdrawing group. Among the give options, only p-toluidine has aniline with an electron donating -CH₃ group which, by virtue of its +I-effect, increases the electron density on N-atom and makes electrons more available for protonation. In o-nitroaniline, p-nitroaniline and 2,4-dinitroaniline, due to presence of electron withdrawing -NO₂ group, the electron density on N-atom is diminished. Thus, it is less basic. Similarly for p-fluoroaniline.
Related Questions: - Dimethyl glyoxime gives a red precipitate with Ni²⁺ ,
- Acetic acid shows twice of its expected molecular weight value experimentally .
- Artificial sweetner which is stable under cold conditions only is
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Topics: Organic compounds containing Nitrogen
(87)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Dimethyl glyoxime gives a red precipitate with Ni²⁺ ,
- Acetic acid shows twice of its expected molecular weight value experimentally .
- Artificial sweetner which is stable under cold conditions only is
- MnO₄²⁻ (1 mole) in neutral aqueous medium is disproportionated to
- A primary alcohol,C₃H₈O (A) on heating with sulphuric acid undergo dehydration
Topics: Organic compounds containing Nitrogen (87)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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