Piperidine is most basic because the lone pair is present in hybrid orbital of N -atom while in pyridine the lone pair is present in hybrid orbital of N - atom. Greater the s character of orbital, more strongly the electrons will be bonded with the atom and less will be the basicity. Pyrrole is least basic among the given compounds due to involvement of its lone pair of electrons towards aromatic sextet formation. Hence, the basicity order is piperidine pyridine pyrrole. So, the correct option is (4).
JEE Main - 2024
CHXII13:AMINES
324059
Aniline is more basic than
1
2
3 N-methyl aniline
4 p-nitroaniline
Explanation:
Nitro group is electron withdrawing group which decreases basic strength.
CHXII13:AMINES
324060
Assertion : reacts with whereas does not. Reason : The electron pair on nitrogen atom in is delocalised in the benzene ring and is not available to boron in .
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Trimethylamine, with three methyl groups, is a strong Lewis base, readily forming a complex with . In contrast, triphenylamine, containing phenyl groups, is less basic due to resonance and less reactive towards Lewis acids like Hence, option (1) is correct.
CHXII13:AMINES
324044
Assertion : Basicity of (I), (II) and (III) is in the order I II III. Reason : Electron-donating groups (such as alkyl group) increase the basicity of amines, and electron-withdrawing groups (such as aryl group) decrease the basicity of amines.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Reason is the correct explanation of Assertion.Presence of electron releasing group at benzene nucleus increases the basic character whereas electron withdrawing group decrease the basic character. Hence, correct order of basicity is
Piperidine is most basic because the lone pair is present in hybrid orbital of N -atom while in pyridine the lone pair is present in hybrid orbital of N - atom. Greater the s character of orbital, more strongly the electrons will be bonded with the atom and less will be the basicity. Pyrrole is least basic among the given compounds due to involvement of its lone pair of electrons towards aromatic sextet formation. Hence, the basicity order is piperidine pyridine pyrrole. So, the correct option is (4).
JEE Main - 2024
CHXII13:AMINES
324059
Aniline is more basic than
1
2
3 N-methyl aniline
4 p-nitroaniline
Explanation:
Nitro group is electron withdrawing group which decreases basic strength.
CHXII13:AMINES
324060
Assertion : reacts with whereas does not. Reason : The electron pair on nitrogen atom in is delocalised in the benzene ring and is not available to boron in .
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Trimethylamine, with three methyl groups, is a strong Lewis base, readily forming a complex with . In contrast, triphenylamine, containing phenyl groups, is less basic due to resonance and less reactive towards Lewis acids like Hence, option (1) is correct.
CHXII13:AMINES
324044
Assertion : Basicity of (I), (II) and (III) is in the order I II III. Reason : Electron-donating groups (such as alkyl group) increase the basicity of amines, and electron-withdrawing groups (such as aryl group) decrease the basicity of amines.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Reason is the correct explanation of Assertion.Presence of electron releasing group at benzene nucleus increases the basic character whereas electron withdrawing group decrease the basic character. Hence, correct order of basicity is
Piperidine is most basic because the lone pair is present in hybrid orbital of N -atom while in pyridine the lone pair is present in hybrid orbital of N - atom. Greater the s character of orbital, more strongly the electrons will be bonded with the atom and less will be the basicity. Pyrrole is least basic among the given compounds due to involvement of its lone pair of electrons towards aromatic sextet formation. Hence, the basicity order is piperidine pyridine pyrrole. So, the correct option is (4).
JEE Main - 2024
CHXII13:AMINES
324059
Aniline is more basic than
1
2
3 N-methyl aniline
4 p-nitroaniline
Explanation:
Nitro group is electron withdrawing group which decreases basic strength.
CHXII13:AMINES
324060
Assertion : reacts with whereas does not. Reason : The electron pair on nitrogen atom in is delocalised in the benzene ring and is not available to boron in .
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Trimethylamine, with three methyl groups, is a strong Lewis base, readily forming a complex with . In contrast, triphenylamine, containing phenyl groups, is less basic due to resonance and less reactive towards Lewis acids like Hence, option (1) is correct.
CHXII13:AMINES
324044
Assertion : Basicity of (I), (II) and (III) is in the order I II III. Reason : Electron-donating groups (such as alkyl group) increase the basicity of amines, and electron-withdrawing groups (such as aryl group) decrease the basicity of amines.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Reason is the correct explanation of Assertion.Presence of electron releasing group at benzene nucleus increases the basic character whereas electron withdrawing group decrease the basic character. Hence, correct order of basicity is
Piperidine is most basic because the lone pair is present in hybrid orbital of N -atom while in pyridine the lone pair is present in hybrid orbital of N - atom. Greater the s character of orbital, more strongly the electrons will be bonded with the atom and less will be the basicity. Pyrrole is least basic among the given compounds due to involvement of its lone pair of electrons towards aromatic sextet formation. Hence, the basicity order is piperidine pyridine pyrrole. So, the correct option is (4).
JEE Main - 2024
CHXII13:AMINES
324059
Aniline is more basic than
1
2
3 N-methyl aniline
4 p-nitroaniline
Explanation:
Nitro group is electron withdrawing group which decreases basic strength.
CHXII13:AMINES
324060
Assertion : reacts with whereas does not. Reason : The electron pair on nitrogen atom in is delocalised in the benzene ring and is not available to boron in .
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Trimethylamine, with three methyl groups, is a strong Lewis base, readily forming a complex with . In contrast, triphenylamine, containing phenyl groups, is less basic due to resonance and less reactive towards Lewis acids like Hence, option (1) is correct.
CHXII13:AMINES
324044
Assertion : Basicity of (I), (II) and (III) is in the order I II III. Reason : Electron-donating groups (such as alkyl group) increase the basicity of amines, and electron-withdrawing groups (such as aryl group) decrease the basicity of amines.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Reason is the correct explanation of Assertion.Presence of electron releasing group at benzene nucleus increases the basic character whereas electron withdrawing group decrease the basic character. Hence, correct order of basicity is