JEE Main 2023 — Chemistry Organic Chemistry

2023mcqeasy

The correct order in aqueous medium of basic strength in case of methyl substituted amines is:

Official previous-year question

Held on 25 Jan 2023 · Verified 6 Jul 2026.

Options

A
${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{3}N>{\mathrm{NH}}_{3}$
B
${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{Me}}_{3}N>{\mathrm{MeNH}}_{2}>{\mathrm{NH}}_{3}$
C
${\mathrm{NH}}_{3}>{\mathrm{Me}}_{3}N>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{2}\mathrm{NH}$
D
${\mathrm{Me}}_{3}N>{\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{NH}}_{3}$

Did you get this right?

Solution

In aqueous medium basic strength is dependent on electron density on nitrogen as well as solvation of cation formed after accepting ${H}^{+}$ . In protic solvent like water, the order of basic strength is

${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{3}N>{\mathrm{NH}}_{3}$ .

This happens beacuse in case of ${\mathrm{Me}}_{2}\mathrm{NH}$ there will be optimum (+I) and solvation while in ${\mathrm{MeNH}}_{2}$ has more significant hydration than ${\mathrm{Me}}_{3}N$ .

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Options

${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{3}N>{\mathrm{NH}}_{3}$

${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{Me}}_{3}N>{\mathrm{MeNH}}_{2}>{\mathrm{NH}}_{3}$

${\mathrm{NH}}_{3}>{\mathrm{Me}}_{3}N>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{2}\mathrm{NH}$

${\mathrm{Me}}_{3}N>{\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{NH}}_{3}$

Solution

${\mathrm{Me}}_{2}\mathrm{NH}>{\mathrm{MeNH}}_{2}>{\mathrm{Me}}_{3}N>{\mathrm{NH}}_{3}$ .

This happens beacuse in case of ${\mathrm{Me}}_{2}\mathrm{NH}$ there will be optimum (+I) and solvation while in ${\mathrm{MeNH}}_{2}$ has more significant hydration than ${\mathrm{Me}}_{3}N$ .

JEE Main 2023 — Chemistry Organic Chemistry

Options

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Solution

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JEE Main 2023 — Chemistry Organic Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Organic Chemistry in other years

More JEE Main Organic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

Inorganic Chemistry

Keep practicing Organic Chemistry