The most basic amine among the following is

⇦

⇨

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:

1. The number of d-electrons in Fe²⁺(Z=26) is not equal to the number of electrons
2. An example of amino acid containing benzene ring is
3. Which of the following is not a coordination compound
4. For alkali metals, which one of the following trends is incorrect
5. As the nuclear charge increases from neon to calcium the orbital energy

Topics: Organic compounds containing Nitrogen (87)
Subject: Chemistry (2512)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends