324102
Which of the following compounds has the most basic nitrogen?
1 a
2 b
3 c
4 d
Explanation:
The most basic nitrogen will be (1). In compound ' \({\mathrm{a}}\) ', lone pair of nitrogen is not in resonance, So It's a strong base compared to compounds b,c,d in which delocalization of electron pair of nitrogen takes place.
CHXII13:AMINES
324103
Which one of the following will be most basic?
1 Aniline
2 p-Methoxyaniline
3 p-Methylaniline
4 Benzylamine
Explanation:
In aniline, \({\text{p}} - \) methoxyaniline and \({\text{p}} - \) methylaniline, the lone pair of electrons on the \(\mathrm{N}\)-atom is delocalised in the benzene ring while in benzylamine it is localised and more available for donation. Hence, benzylamine is most basic among the given compounds.
CHXII13:AMINES
324104
Considering the basic strength of amines in aqueous solution, which one has the smallest \(p K_{b}\) value?
It is known that, \(p K_{b}=-\log K_{b}\) Thus, larger the value of \(K_{b}\) smaller is the value of \(p K_{b}\), hence, stronger is the base. The order of basic strength of amines is as follows: \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H > C}}{{\rm{H}}_{\rm{3}}}\mathop {\rm{N}}\limits^{..} {{\rm{H}}_{\rm{2}}}{\rm{ > }}{\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{3}}}{\rm{\;}}\mathop {\rm{N}}\limits^{..} {\rm{ > }}{{\rm{C}}_{\rm{6}}}{{\rm{\ddot H}}_{\rm{5}}}{\rm{N}}{{\rm{H}}_{\rm{2}}}\) The basic strength of amines depends on the inductive effect as well as steric hindrance of alkyl groups. Hence, \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H}}\) [secondary amine] possesses the smallest value of \({\rm{p}}{{\rm{K}}_{\rm{b}}}{\rm{.}}\)
CHXII13:AMINES
324105
Which one of the following is the strongest base in aqueous solution?
1 Aniline
2 p-Bromo aniline
3 p-methyl aniline
4 p-amino benzoic acid
Explanation:
EDG increases basic strength and EWG decreases basic strength
324102
Which of the following compounds has the most basic nitrogen?
1 a
2 b
3 c
4 d
Explanation:
The most basic nitrogen will be (1). In compound ' \({\mathrm{a}}\) ', lone pair of nitrogen is not in resonance, So It's a strong base compared to compounds b,c,d in which delocalization of electron pair of nitrogen takes place.
CHXII13:AMINES
324103
Which one of the following will be most basic?
1 Aniline
2 p-Methoxyaniline
3 p-Methylaniline
4 Benzylamine
Explanation:
In aniline, \({\text{p}} - \) methoxyaniline and \({\text{p}} - \) methylaniline, the lone pair of electrons on the \(\mathrm{N}\)-atom is delocalised in the benzene ring while in benzylamine it is localised and more available for donation. Hence, benzylamine is most basic among the given compounds.
CHXII13:AMINES
324104
Considering the basic strength of amines in aqueous solution, which one has the smallest \(p K_{b}\) value?
It is known that, \(p K_{b}=-\log K_{b}\) Thus, larger the value of \(K_{b}\) smaller is the value of \(p K_{b}\), hence, stronger is the base. The order of basic strength of amines is as follows: \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H > C}}{{\rm{H}}_{\rm{3}}}\mathop {\rm{N}}\limits^{..} {{\rm{H}}_{\rm{2}}}{\rm{ > }}{\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{3}}}{\rm{\;}}\mathop {\rm{N}}\limits^{..} {\rm{ > }}{{\rm{C}}_{\rm{6}}}{{\rm{\ddot H}}_{\rm{5}}}{\rm{N}}{{\rm{H}}_{\rm{2}}}\) The basic strength of amines depends on the inductive effect as well as steric hindrance of alkyl groups. Hence, \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H}}\) [secondary amine] possesses the smallest value of \({\rm{p}}{{\rm{K}}_{\rm{b}}}{\rm{.}}\)
CHXII13:AMINES
324105
Which one of the following is the strongest base in aqueous solution?
1 Aniline
2 p-Bromo aniline
3 p-methyl aniline
4 p-amino benzoic acid
Explanation:
EDG increases basic strength and EWG decreases basic strength
324102
Which of the following compounds has the most basic nitrogen?
1 a
2 b
3 c
4 d
Explanation:
The most basic nitrogen will be (1). In compound ' \({\mathrm{a}}\) ', lone pair of nitrogen is not in resonance, So It's a strong base compared to compounds b,c,d in which delocalization of electron pair of nitrogen takes place.
CHXII13:AMINES
324103
Which one of the following will be most basic?
1 Aniline
2 p-Methoxyaniline
3 p-Methylaniline
4 Benzylamine
Explanation:
In aniline, \({\text{p}} - \) methoxyaniline and \({\text{p}} - \) methylaniline, the lone pair of electrons on the \(\mathrm{N}\)-atom is delocalised in the benzene ring while in benzylamine it is localised and more available for donation. Hence, benzylamine is most basic among the given compounds.
CHXII13:AMINES
324104
Considering the basic strength of amines in aqueous solution, which one has the smallest \(p K_{b}\) value?
It is known that, \(p K_{b}=-\log K_{b}\) Thus, larger the value of \(K_{b}\) smaller is the value of \(p K_{b}\), hence, stronger is the base. The order of basic strength of amines is as follows: \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H > C}}{{\rm{H}}_{\rm{3}}}\mathop {\rm{N}}\limits^{..} {{\rm{H}}_{\rm{2}}}{\rm{ > }}{\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{3}}}{\rm{\;}}\mathop {\rm{N}}\limits^{..} {\rm{ > }}{{\rm{C}}_{\rm{6}}}{{\rm{\ddot H}}_{\rm{5}}}{\rm{N}}{{\rm{H}}_{\rm{2}}}\) The basic strength of amines depends on the inductive effect as well as steric hindrance of alkyl groups. Hence, \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H}}\) [secondary amine] possesses the smallest value of \({\rm{p}}{{\rm{K}}_{\rm{b}}}{\rm{.}}\)
CHXII13:AMINES
324105
Which one of the following is the strongest base in aqueous solution?
1 Aniline
2 p-Bromo aniline
3 p-methyl aniline
4 p-amino benzoic acid
Explanation:
EDG increases basic strength and EWG decreases basic strength
324102
Which of the following compounds has the most basic nitrogen?
1 a
2 b
3 c
4 d
Explanation:
The most basic nitrogen will be (1). In compound ' \({\mathrm{a}}\) ', lone pair of nitrogen is not in resonance, So It's a strong base compared to compounds b,c,d in which delocalization of electron pair of nitrogen takes place.
CHXII13:AMINES
324103
Which one of the following will be most basic?
1 Aniline
2 p-Methoxyaniline
3 p-Methylaniline
4 Benzylamine
Explanation:
In aniline, \({\text{p}} - \) methoxyaniline and \({\text{p}} - \) methylaniline, the lone pair of electrons on the \(\mathrm{N}\)-atom is delocalised in the benzene ring while in benzylamine it is localised and more available for donation. Hence, benzylamine is most basic among the given compounds.
CHXII13:AMINES
324104
Considering the basic strength of amines in aqueous solution, which one has the smallest \(p K_{b}\) value?
It is known that, \(p K_{b}=-\log K_{b}\) Thus, larger the value of \(K_{b}\) smaller is the value of \(p K_{b}\), hence, stronger is the base. The order of basic strength of amines is as follows: \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H > C}}{{\rm{H}}_{\rm{3}}}\mathop {\rm{N}}\limits^{..} {{\rm{H}}_{\rm{2}}}{\rm{ > }}{\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{3}}}{\rm{\;}}\mathop {\rm{N}}\limits^{..} {\rm{ > }}{{\rm{C}}_{\rm{6}}}{{\rm{\ddot H}}_{\rm{5}}}{\rm{N}}{{\rm{H}}_{\rm{2}}}\) The basic strength of amines depends on the inductive effect as well as steric hindrance of alkyl groups. Hence, \({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}\mathop {\rm{N}}\limits^{..} {\rm{H}}\) [secondary amine] possesses the smallest value of \({\rm{p}}{{\rm{K}}_{\rm{b}}}{\rm{.}}\)
CHXII13:AMINES
324105
Which one of the following is the strongest base in aqueous solution?
1 Aniline
2 p-Bromo aniline
3 p-methyl aniline
4 p-amino benzoic acid
Explanation:
EDG increases basic strength and EWG decreases basic strength
