Practice question

MCQ

Question

Which of the following is the correct decreasing order of basic strength in the gas phase?

Options

Choose one · Correct answer highlighted

Câ‚‚Hâ‚…NHâ‚‚ > (Câ‚‚Hâ‚…)2NH > (Câ‚‚Hâ‚…)3N > NHâ‚ƒ NHâ‚ƒ > Câ‚‚Hâ‚…NHâ‚‚ > (Câ‚‚Hâ‚…)2NH > (Câ‚‚Hâ‚…)3N (Câ‚‚Hâ‚…)2NH > (Câ‚‚Hâ‚…)3N > Câ‚‚Hâ‚…NHâ‚‚ > NHâ‚ƒ (Câ‚‚Hâ‚…)3N > (Câ‚‚Hâ‚…)2NH > Câ‚‚Hâ‚…NHâ‚‚ > NHâ‚ƒ Correct

Explanation

In the gas phase, basicity increases with the number of alkyl groups due to the inductive effect: (Câ‚‚Hâ‚…)3N > (Câ‚‚Hâ‚…)2NH > Câ‚‚Hâ‚…NHâ‚‚ > NHâ‚ƒ . This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

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