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12 grade chemistry others

The basicity of aniline is weaker in comparison to that of methylamine due to:

  • A. Hyper conjugative effect of Me - group MeNH₂
  • B. Resonance effect of the phenyl group in aniline
  • C. The lower molecular weight of methylamine compared to that of aniline
  • D. Resonance effect of - NH₂ group in MeNH₂

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1 Year agoGrade
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1 Answer

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ApprovedApproved Tutor Answer1 Year ago

The basicity of aniline is indeed weaker than that of methylamine, and this can be attributed primarily to the resonance effect of the phenyl group in aniline.

Key Factors Influencing Basicity

  • Resonance Effect: In aniline, the lone pair of electrons on the nitrogen atom can delocalize into the aromatic ring. This reduces the availability of the lone pair for bonding with protons, making aniline less basic.
  • Hyperconjugation: Methylamine benefits from the electron-donating effect of the methyl group, which enhances the electron density on the nitrogen, increasing its basicity.
  • Molecular Weight: While the molecular weight of methylamine is lower, this factor does not significantly impact basicity compared to the resonance effects.

Conclusion

Thus, the correct answer is B. Resonance effect of the phenyl group in aniline, as it plays a crucial role in reducing the basicity of aniline compared to methylamine.


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is Pradeep Chemistry+Ncert sufficient for all of the theory of Jee Mains Chemistry?


Hi, I’m a self-study JEE 2027 aspirant with a large 11th backlog. Since I don’t think 6–8 hour one-shots are sufficient to cover the full theory + breadth of problem types of a JEE chapter, I’ve shifted from lecture-based preparation to book-based self-study.


I have a problem with using NCERT as my primary chemistry source. In my experience, it is concise and information-heavy, but often lacks detailed explanations, systematic organisation of concepts, and categorisation of problem types. This seems especially problematic for Physical and Organic Chemistry, where I feel that simply reading NCERT may not give enough depth or problem-solving preparation.


So I’m considering this approach:


Pradeep Chemistry → complete the chapter thoroughly from Pradeep → then read NCERT for that chapter → solve JEE Main PYQs/problems.


My main question is:


Is Pradeep + NCERT sufficient as the complete theory source for JEE Main-level Chemistry?


In other words, after thoroughly completing a chapter from Pradeep and then NCERT, can I consider the theory part of that chapter complete for JEE Main, with only PYQs/problem practice remaining?


I’m asking specifically about JEE Main level, not Advanced.


Also, if Pradeep is not sufficient, what specific gap does it leave, and what would you recommend as a better book-based alternative for self-study?

Grade 1212 grade chemistry others

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