324052
Which of the following statements are correct?
1 Aniline is a stronger base than ethyl amine
2 Aniline is a stronger base than p-methoxyaniline
3 Aniline must be acetylated before nitration with an acid derivative
4 Aniline is soluble in an ammonium hydroxide solution
Explanation:
Only statement (3) is correct, whereas statement ( 1 , 2 and 4 ) are incorrect. Basic character depends upon the availability of lone pair of electrons for donation. Aliphatic amines are generally more basic than aromatic amines because lone pair takes part in delocalisation in case of aromatic amines. Presence of electron releasing group at benzene nucleus increases the basic character of amine. Amino group strongly activates the ring through delocalisation of lone pair of electrons of \(\mathrm{N}\)-atom over the aromatic ring. Thus, electron density increases more at \(o\) - and \(p\) - positions as compared to \(m\)-position.
CHXII13:AMINES
324053
Benzylamine is a stronger base than aniline because
1 the long pair of electrons on the nitrogen atom in benzylamine is delocalised
2 the lone pair of electrons on the nitrogen atom in aniline is delocalised
3 the lone pair of electrons on the nitrogen atom in aniline is not involved in resonance
4 benzylamine has a higher molecular mass than aniline
Explanation:
Conceptual Questions
KCET - 2012
CHXII13:AMINES
324054
The incorrect order with respect to the acidic strength is
Usually presence of electron withdrawing groups such as F, \(\mathrm{Cl}, \mathrm{CHO}\) etc., increase the acidic strength and presence of electron releasing groups such as \( - {\rm{R}}, - {\rm{OC}}{{\rm{H}}_3}\) etc., decrease the acidic strength. Aromatic compounds are more acidic than their corresponding aliphatic compounds due to resonance stabilisation. Hence, the correct order of acidic strength is
CHXII13:AMINES
324055
Total number of compounds which are less basic than aniline is ____ . p -Toluidine, p-chloroaniline, p-methoxyaniline, m -nitroaniline, o -bromoaniline
1 1
2 2
3 3
4 4
Explanation:
Substituted aniline containing electron withdrawing groups are less basic than aniline. Thus, p-chloroaniline, m-nitroaniline, o-bromoaniline are less basic than aniline.
324052
Which of the following statements are correct?
1 Aniline is a stronger base than ethyl amine
2 Aniline is a stronger base than p-methoxyaniline
3 Aniline must be acetylated before nitration with an acid derivative
4 Aniline is soluble in an ammonium hydroxide solution
Explanation:
Only statement (3) is correct, whereas statement ( 1 , 2 and 4 ) are incorrect. Basic character depends upon the availability of lone pair of electrons for donation. Aliphatic amines are generally more basic than aromatic amines because lone pair takes part in delocalisation in case of aromatic amines. Presence of electron releasing group at benzene nucleus increases the basic character of amine. Amino group strongly activates the ring through delocalisation of lone pair of electrons of \(\mathrm{N}\)-atom over the aromatic ring. Thus, electron density increases more at \(o\) - and \(p\) - positions as compared to \(m\)-position.
CHXII13:AMINES
324053
Benzylamine is a stronger base than aniline because
1 the long pair of electrons on the nitrogen atom in benzylamine is delocalised
2 the lone pair of electrons on the nitrogen atom in aniline is delocalised
3 the lone pair of electrons on the nitrogen atom in aniline is not involved in resonance
4 benzylamine has a higher molecular mass than aniline
Explanation:
Conceptual Questions
KCET - 2012
CHXII13:AMINES
324054
The incorrect order with respect to the acidic strength is
Usually presence of electron withdrawing groups such as F, \(\mathrm{Cl}, \mathrm{CHO}\) etc., increase the acidic strength and presence of electron releasing groups such as \( - {\rm{R}}, - {\rm{OC}}{{\rm{H}}_3}\) etc., decrease the acidic strength. Aromatic compounds are more acidic than their corresponding aliphatic compounds due to resonance stabilisation. Hence, the correct order of acidic strength is
CHXII13:AMINES
324055
Total number of compounds which are less basic than aniline is ____ . p -Toluidine, p-chloroaniline, p-methoxyaniline, m -nitroaniline, o -bromoaniline
1 1
2 2
3 3
4 4
Explanation:
Substituted aniline containing electron withdrawing groups are less basic than aniline. Thus, p-chloroaniline, m-nitroaniline, o-bromoaniline are less basic than aniline.
324052
Which of the following statements are correct?
1 Aniline is a stronger base than ethyl amine
2 Aniline is a stronger base than p-methoxyaniline
3 Aniline must be acetylated before nitration with an acid derivative
4 Aniline is soluble in an ammonium hydroxide solution
Explanation:
Only statement (3) is correct, whereas statement ( 1 , 2 and 4 ) are incorrect. Basic character depends upon the availability of lone pair of electrons for donation. Aliphatic amines are generally more basic than aromatic amines because lone pair takes part in delocalisation in case of aromatic amines. Presence of electron releasing group at benzene nucleus increases the basic character of amine. Amino group strongly activates the ring through delocalisation of lone pair of electrons of \(\mathrm{N}\)-atom over the aromatic ring. Thus, electron density increases more at \(o\) - and \(p\) - positions as compared to \(m\)-position.
CHXII13:AMINES
324053
Benzylamine is a stronger base than aniline because
1 the long pair of electrons on the nitrogen atom in benzylamine is delocalised
2 the lone pair of electrons on the nitrogen atom in aniline is delocalised
3 the lone pair of electrons on the nitrogen atom in aniline is not involved in resonance
4 benzylamine has a higher molecular mass than aniline
Explanation:
Conceptual Questions
KCET - 2012
CHXII13:AMINES
324054
The incorrect order with respect to the acidic strength is
Usually presence of electron withdrawing groups such as F, \(\mathrm{Cl}, \mathrm{CHO}\) etc., increase the acidic strength and presence of electron releasing groups such as \( - {\rm{R}}, - {\rm{OC}}{{\rm{H}}_3}\) etc., decrease the acidic strength. Aromatic compounds are more acidic than their corresponding aliphatic compounds due to resonance stabilisation. Hence, the correct order of acidic strength is
CHXII13:AMINES
324055
Total number of compounds which are less basic than aniline is ____ . p -Toluidine, p-chloroaniline, p-methoxyaniline, m -nitroaniline, o -bromoaniline
1 1
2 2
3 3
4 4
Explanation:
Substituted aniline containing electron withdrawing groups are less basic than aniline. Thus, p-chloroaniline, m-nitroaniline, o-bromoaniline are less basic than aniline.
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII13:AMINES
324052
Which of the following statements are correct?
1 Aniline is a stronger base than ethyl amine
2 Aniline is a stronger base than p-methoxyaniline
3 Aniline must be acetylated before nitration with an acid derivative
4 Aniline is soluble in an ammonium hydroxide solution
Explanation:
Only statement (3) is correct, whereas statement ( 1 , 2 and 4 ) are incorrect. Basic character depends upon the availability of lone pair of electrons for donation. Aliphatic amines are generally more basic than aromatic amines because lone pair takes part in delocalisation in case of aromatic amines. Presence of electron releasing group at benzene nucleus increases the basic character of amine. Amino group strongly activates the ring through delocalisation of lone pair of electrons of \(\mathrm{N}\)-atom over the aromatic ring. Thus, electron density increases more at \(o\) - and \(p\) - positions as compared to \(m\)-position.
CHXII13:AMINES
324053
Benzylamine is a stronger base than aniline because
1 the long pair of electrons on the nitrogen atom in benzylamine is delocalised
2 the lone pair of electrons on the nitrogen atom in aniline is delocalised
3 the lone pair of electrons on the nitrogen atom in aniline is not involved in resonance
4 benzylamine has a higher molecular mass than aniline
Explanation:
Conceptual Questions
KCET - 2012
CHXII13:AMINES
324054
The incorrect order with respect to the acidic strength is
Usually presence of electron withdrawing groups such as F, \(\mathrm{Cl}, \mathrm{CHO}\) etc., increase the acidic strength and presence of electron releasing groups such as \( - {\rm{R}}, - {\rm{OC}}{{\rm{H}}_3}\) etc., decrease the acidic strength. Aromatic compounds are more acidic than their corresponding aliphatic compounds due to resonance stabilisation. Hence, the correct order of acidic strength is
CHXII13:AMINES
324055
Total number of compounds which are less basic than aniline is ____ . p -Toluidine, p-chloroaniline, p-methoxyaniline, m -nitroaniline, o -bromoaniline
1 1
2 2
3 3
4 4
Explanation:
Substituted aniline containing electron withdrawing groups are less basic than aniline. Thus, p-chloroaniline, m-nitroaniline, o-bromoaniline are less basic than aniline.
