Amines

Mediumchemistry

Which of the following is the correct decreasing order of basic strength in aqueous solution?

Select the correct option:

$A ni l in e > A mm o nia > Et h y l amin e > D im e t h y l amin e$

$D im e t h y l amin e > Et h y l amin e > A mm o nia > A ni l in e$

$A mm o nia > D im e t h y l amin e > Et h y l amin e > A ni l in e$

$Et h y l amin e > A ni l in e > D im e t h y l amin e > A mm o nia$

🔒 Solution Hidden from View

Submit your answer to unlock the detailed step-by-step solution.

About This Question

Subject: chemistry
Chapter: organic compounds containing nitrogen
Topic: amines
Difficulty: Medium
Year: 2025

Solution

Correct Answer:

$D im e t h y l amin e > Et h y l amin e > A mm o nia > A ni l in e$

In water, aliphatic amines are generally more basic than ammonia due to +I effect of alkyl groups. Among lower amines, secondary amines are often strongest in aqueous medium because they combine favorable +I effect with effective solvation. Aniline is least basic here because the lone pair on nitrogen is delocalized into the benzene ring by resonance, making it less available for protonation. Therefore the order is dimethylamine > ethylamine > ammonia > aniline.

This medium difficulty chemistry question is from the chapter organic compounds containing nitrogen, covering the topic of amines. It appeared in the 2025 exam.

Looking for more practice? Explore all chemistry questions or browse organic compounds containing nitrogen questions on RankGuru.

Amines

Select the correct option:

🔒 Solution Hidden from View

More organic compounds containing nitrogen Practice Questions

Aniline is a weaker base than cyclohexylamine mainly because:

Which compound gives a positive carbylamine test?

A solution is prepared by dissolving 4.65 g of CH3NH2 (molar mass = 31 g mol-1) in water and making ...

The value of pKa of anilinium ion (C6H5NH3+) at 25 C is closest to (Given: Kb of aniline = 4.3 x 10-...

In Hinsberg's test, which class of amines does not form a sulfonamide derivative with benzenesulfony...

The order of basicity of amines in aqueous solution is:

About This Question

Solution