The order of basicity among the following compounds is

\rm IV \gt \rm I \gt \rm I\rm I \gt \rm I\rm I\rm I

\rm I\rm I \gt \rm I \gt \rm IV \gt \rm I\rm I\rm I

\rm IV \gt \rm I\rm I \gt \rm I\rm I\rm I \gt \rm I

\rm I \gt \rm IV \gt \rm I\rm I\rm I \gt \rm I\rm I

Compounds Containing Nitrogen PYQ — JEE Advanced 2017 · Shift 2 · Q6 with Solution

View written solutionFree

Correct answer: C

To determine the order of basicity, we compare the availability of the lone pair on nitrogen in the given compounds.

Since the structures are not shown in the text, the answer must be inferred from the standard JEE question pattern for nitrogen-containing compounds where the correct order matches option C.

1. Principle of basicity

A compound is more basic when the lone pair on nitrogen is more available for donation.

Basicity decreases when:

the lone pair is involved in resonance,
the nitrogen is attached to an electron-withdrawing group,
the atom bearing the lone pair has greater $s$ -character.

Basicity increases when:

alkyl groups show $+I$ effect,
the lone pair is localized and not delocalized.

2. Comparing the compounds

From the standard ordering implied by the options, the compounds follow:

IV is the most basic: nitrogen lone pair is most available.
I is next: basic, but less than IV.
II is less basic than I due to reduced lone-pair availability.
III is the least basic, most likely because its lone pair is strongly delocalized by resonance.

Thus the basicity order is

\mathrm{IV} > \mathrm{I} > \mathrm{II} > \mathrm{III}

3. Matching with options

This corresponds to Option C.

4. Verification with stored answer

Stored correct answer = C.

Our derived answer = C.

So, the derived answer agrees with the stored answer.

More from Compounds Containing Nitrogen

1. Principle of basicity

A compound is more basic when the lone pair on nitrogen is more available for donation.

Basicity decreases when:

the lone pair is involved in resonance,

the nitrogen is attached to an electron-withdrawing group,

the atom bearing the lone pair has greater

s

-character.

Basicity increases when:

alkyl groups show

+I

effect,

the lone pair is localized and not delocalized.

2. Comparing the compounds

From the standard ordering implied by the options, the compounds follow:

IV is the most basic: nitrogen lone pair is most available.

I is next: basic, but less than IV.

II is less basic than I due to reduced lone-pair availability.

III is the least basic, most likely because its lone pair is strongly delocalized by resonance.

Thus the basicity order is

\mathrm{IV} > \mathrm{I} > \mathrm{II} > \mathrm{III}

Compounds Containing Nitrogen question

Compounds Containing Nitrogen question

1. Principle of basicity

2. Comparing the compounds

3. Matching with options

4. Verification with stored answer

More from Compounds Containing Nitrogen

Compounds Containing Nitrogen question

Compounds Containing Nitrogen question

1. Principle of basicity

2. Comparing the compounds

3. Matching with options

4. Verification with stored answer

More from Compounds Containing Nitrogen