Choose the correct answer from the options given below:
1 A - R, B - S, C - Q , D - P
2 A - R, B - Q , C - S, D - P
3 A - P, B - S, C - Q , D - R
4 A - R, B - Q , C - P, D - S
Explanation:
Stronger the base, higher the value of \(K_{b}\) and lower will be the value of \(\mathrm{pK}_{\mathrm{b}}\). The decreasing order of basic strength of given amines is \(\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) \(>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) Hence, the order of \(\mathrm{pK}_{\mathrm{b}}\) will be
JEE - 2023
CHXII13:AMINES
324068
Which of the following amine is weakest base?
1 Trimethyl amine
2 Methyl amine
3 Diethyl amine
4 Aniline
Explanation:
Aryl amines are weaker bases than aliphatic amines due to resonance.
MHTCET - 2021
CHXII13:AMINES
324069
Which of the following orders is correct regarding basicity of indicated molecules?
Presence of electron withdrawing group like phenyl group decreases the electron density of nitrogen and hence, the lone pair of nitrogen is not available for donation. Thus, \(\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) is least basic because of the presence of three electron withdrawing phenyl groups.
CHXII13:AMINES
324071
Pyridine is less basic than triethylamine because
1 Pyridine has aromatic character
2 Nitrogen in pyridine is \(\mathrm{sp}^{2}-\) hybridised
3 Pyridine is a cyclic system
4 In pyridine lone pair of nitrogen is delocalised
Explanation:
Triethylamine is highly basic (in gaseous state or in non - polar medium) due to \(+\mathrm{I}\) - effect of \(-\mathrm{C}_{2} \mathrm{H}_{5}\) groups which increases electron density over \(\mathrm{N}\) atom where as in pyridine electorn density over \(\mathrm{N}\) atom is less due to resonance.
Choose the correct answer from the options given below:
1 A - R, B - S, C - Q , D - P
2 A - R, B - Q , C - S, D - P
3 A - P, B - S, C - Q , D - R
4 A - R, B - Q , C - P, D - S
Explanation:
Stronger the base, higher the value of \(K_{b}\) and lower will be the value of \(\mathrm{pK}_{\mathrm{b}}\). The decreasing order of basic strength of given amines is \(\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) \(>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) Hence, the order of \(\mathrm{pK}_{\mathrm{b}}\) will be
JEE - 2023
CHXII13:AMINES
324068
Which of the following amine is weakest base?
1 Trimethyl amine
2 Methyl amine
3 Diethyl amine
4 Aniline
Explanation:
Aryl amines are weaker bases than aliphatic amines due to resonance.
MHTCET - 2021
CHXII13:AMINES
324069
Which of the following orders is correct regarding basicity of indicated molecules?
Presence of electron withdrawing group like phenyl group decreases the electron density of nitrogen and hence, the lone pair of nitrogen is not available for donation. Thus, \(\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) is least basic because of the presence of three electron withdrawing phenyl groups.
CHXII13:AMINES
324071
Pyridine is less basic than triethylamine because
1 Pyridine has aromatic character
2 Nitrogen in pyridine is \(\mathrm{sp}^{2}-\) hybridised
3 Pyridine is a cyclic system
4 In pyridine lone pair of nitrogen is delocalised
Explanation:
Triethylamine is highly basic (in gaseous state or in non - polar medium) due to \(+\mathrm{I}\) - effect of \(-\mathrm{C}_{2} \mathrm{H}_{5}\) groups which increases electron density over \(\mathrm{N}\) atom where as in pyridine electorn density over \(\mathrm{N}\) atom is less due to resonance.
Choose the correct answer from the options given below:
1 A - R, B - S, C - Q , D - P
2 A - R, B - Q , C - S, D - P
3 A - P, B - S, C - Q , D - R
4 A - R, B - Q , C - P, D - S
Explanation:
Stronger the base, higher the value of \(K_{b}\) and lower will be the value of \(\mathrm{pK}_{\mathrm{b}}\). The decreasing order of basic strength of given amines is \(\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) \(>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) Hence, the order of \(\mathrm{pK}_{\mathrm{b}}\) will be
JEE - 2023
CHXII13:AMINES
324068
Which of the following amine is weakest base?
1 Trimethyl amine
2 Methyl amine
3 Diethyl amine
4 Aniline
Explanation:
Aryl amines are weaker bases than aliphatic amines due to resonance.
MHTCET - 2021
CHXII13:AMINES
324069
Which of the following orders is correct regarding basicity of indicated molecules?
Presence of electron withdrawing group like phenyl group decreases the electron density of nitrogen and hence, the lone pair of nitrogen is not available for donation. Thus, \(\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) is least basic because of the presence of three electron withdrawing phenyl groups.
CHXII13:AMINES
324071
Pyridine is less basic than triethylamine because
1 Pyridine has aromatic character
2 Nitrogen in pyridine is \(\mathrm{sp}^{2}-\) hybridised
3 Pyridine is a cyclic system
4 In pyridine lone pair of nitrogen is delocalised
Explanation:
Triethylamine is highly basic (in gaseous state or in non - polar medium) due to \(+\mathrm{I}\) - effect of \(-\mathrm{C}_{2} \mathrm{H}_{5}\) groups which increases electron density over \(\mathrm{N}\) atom where as in pyridine electorn density over \(\mathrm{N}\) atom is less due to resonance.
Choose the correct answer from the options given below:
1 A - R, B - S, C - Q , D - P
2 A - R, B - Q , C - S, D - P
3 A - P, B - S, C - Q , D - R
4 A - R, B - Q , C - P, D - S
Explanation:
Stronger the base, higher the value of \(K_{b}\) and lower will be the value of \(\mathrm{pK}_{\mathrm{b}}\). The decreasing order of basic strength of given amines is \(\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) \(>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) Hence, the order of \(\mathrm{pK}_{\mathrm{b}}\) will be
JEE - 2023
CHXII13:AMINES
324068
Which of the following amine is weakest base?
1 Trimethyl amine
2 Methyl amine
3 Diethyl amine
4 Aniline
Explanation:
Aryl amines are weaker bases than aliphatic amines due to resonance.
MHTCET - 2021
CHXII13:AMINES
324069
Which of the following orders is correct regarding basicity of indicated molecules?
Presence of electron withdrawing group like phenyl group decreases the electron density of nitrogen and hence, the lone pair of nitrogen is not available for donation. Thus, \(\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) is least basic because of the presence of three electron withdrawing phenyl groups.
CHXII13:AMINES
324071
Pyridine is less basic than triethylamine because
1 Pyridine has aromatic character
2 Nitrogen in pyridine is \(\mathrm{sp}^{2}-\) hybridised
3 Pyridine is a cyclic system
4 In pyridine lone pair of nitrogen is delocalised
Explanation:
Triethylamine is highly basic (in gaseous state or in non - polar medium) due to \(+\mathrm{I}\) - effect of \(-\mathrm{C}_{2} \mathrm{H}_{5}\) groups which increases electron density over \(\mathrm{N}\) atom where as in pyridine electorn density over \(\mathrm{N}\) atom is less due to resonance.
Choose the correct answer from the options given below:
1 A - R, B - S, C - Q , D - P
2 A - R, B - Q , C - S, D - P
3 A - P, B - S, C - Q , D - R
4 A - R, B - Q , C - P, D - S
Explanation:
Stronger the base, higher the value of \(K_{b}\) and lower will be the value of \(\mathrm{pK}_{\mathrm{b}}\). The decreasing order of basic strength of given amines is \(\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{2} \mathrm{NH}>\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) \(>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\) Hence, the order of \(\mathrm{pK}_{\mathrm{b}}\) will be
JEE - 2023
CHXII13:AMINES
324068
Which of the following amine is weakest base?
1 Trimethyl amine
2 Methyl amine
3 Diethyl amine
4 Aniline
Explanation:
Aryl amines are weaker bases than aliphatic amines due to resonance.
MHTCET - 2021
CHXII13:AMINES
324069
Which of the following orders is correct regarding basicity of indicated molecules?
Presence of electron withdrawing group like phenyl group decreases the electron density of nitrogen and hence, the lone pair of nitrogen is not available for donation. Thus, \(\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{3} \mathrm{~N}\) is least basic because of the presence of three electron withdrawing phenyl groups.
CHXII13:AMINES
324071
Pyridine is less basic than triethylamine because
1 Pyridine has aromatic character
2 Nitrogen in pyridine is \(\mathrm{sp}^{2}-\) hybridised
3 Pyridine is a cyclic system
4 In pyridine lone pair of nitrogen is delocalised
Explanation:
Triethylamine is highly basic (in gaseous state or in non - polar medium) due to \(+\mathrm{I}\) - effect of \(-\mathrm{C}_{2} \mathrm{H}_{5}\) groups which increases electron density over \(\mathrm{N}\) atom where as in pyridine electorn density over \(\mathrm{N}\) atom is less due to resonance.
