231302
The most stable carbanion among the following is:
1
2
3
4
Explanation:
Carbanion is stabilized by delocalization and $-\mathrm{I}$ effect, $+\mathrm{I}$ effect and $+\mathrm{M}$ effect decrease the stability of carbanion. Hence- It is most stable carbanion because it have -I effect by nitro group as well as delocalization. Hence 'd' option is correct. We can determine the order of stability
AIIMS-2012
GENERAL ORGANIC CHEMISTRY
231304
Which is the correct order of stability of the following three carbonium ions?
1 I $>$ II $>$ III
2 II $>$ I $>$ III
3 I $\approx$ III $>$ II
4 All are equally stable
Explanation:
Carbocation or carbonium ion is stabilized by + I effect and delocalization of electron delocalization of electron is dominating factor over the $+\mathrm{I}$ effect. Hence the order of stability is I $\approx$ III $>$ II.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
231306
Match the following |List-I (Species)|List-II (lone pairs)| |---|---| |(A) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$|(I) 2| |(B) $\mathrm{CH}_{3} \mathbf{C} \stackrel{\oplus}{\mathrm{O}}$|(II) 0| |(C) $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2} \mathrm{CH}_{3}$|(III) 1|
1 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { I } \text { III }\end{array}$
2 $\mathrm{A}$ B $\mathrm{C}$
3 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { IV } \text { III }\end{array}$
4 $\begin{array}{llc}\text { A } \text { B } \text { C } \\ \text { II } \text { II } \text { IV }\end{array}$
Explanation:
(B) :
07.08.2021 Shift-II]**
GENERAL ORGANIC CHEMISTRY
231309
The order of acidic strength of following acids is
1 (iii) $>$ (ii) $>$ (i)
2 (ii) $>$ (iii) $>$ (i)
3 (iii) $>$ (i) $>$ (ii)
4 (ii) $>$ (i) $>$ (iii)
Explanation:
(A) : Decreases acidity Increases acidity Aromatic carboxylic acids are stronger to aliphatic carboxylic acids. Acidic strength order - (iii) $>$ (ii) $>$ (i)
231302
The most stable carbanion among the following is:
1
2
3
4
Explanation:
Carbanion is stabilized by delocalization and $-\mathrm{I}$ effect, $+\mathrm{I}$ effect and $+\mathrm{M}$ effect decrease the stability of carbanion. Hence- It is most stable carbanion because it have -I effect by nitro group as well as delocalization. Hence 'd' option is correct. We can determine the order of stability
AIIMS-2012
GENERAL ORGANIC CHEMISTRY
231304
Which is the correct order of stability of the following three carbonium ions?
1 I $>$ II $>$ III
2 II $>$ I $>$ III
3 I $\approx$ III $>$ II
4 All are equally stable
Explanation:
Carbocation or carbonium ion is stabilized by + I effect and delocalization of electron delocalization of electron is dominating factor over the $+\mathrm{I}$ effect. Hence the order of stability is I $\approx$ III $>$ II.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
231306
Match the following |List-I (Species)|List-II (lone pairs)| |---|---| |(A) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$|(I) 2| |(B) $\mathrm{CH}_{3} \mathbf{C} \stackrel{\oplus}{\mathrm{O}}$|(II) 0| |(C) $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2} \mathrm{CH}_{3}$|(III) 1|
1 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { I } \text { III }\end{array}$
2 $\mathrm{A}$ B $\mathrm{C}$
3 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { IV } \text { III }\end{array}$
4 $\begin{array}{llc}\text { A } \text { B } \text { C } \\ \text { II } \text { II } \text { IV }\end{array}$
Explanation:
(B) :
07.08.2021 Shift-II]**
GENERAL ORGANIC CHEMISTRY
231309
The order of acidic strength of following acids is
1 (iii) $>$ (ii) $>$ (i)
2 (ii) $>$ (iii) $>$ (i)
3 (iii) $>$ (i) $>$ (ii)
4 (ii) $>$ (i) $>$ (iii)
Explanation:
(A) : Decreases acidity Increases acidity Aromatic carboxylic acids are stronger to aliphatic carboxylic acids. Acidic strength order - (iii) $>$ (ii) $>$ (i)
231302
The most stable carbanion among the following is:
1
2
3
4
Explanation:
Carbanion is stabilized by delocalization and $-\mathrm{I}$ effect, $+\mathrm{I}$ effect and $+\mathrm{M}$ effect decrease the stability of carbanion. Hence- It is most stable carbanion because it have -I effect by nitro group as well as delocalization. Hence 'd' option is correct. We can determine the order of stability
AIIMS-2012
GENERAL ORGANIC CHEMISTRY
231304
Which is the correct order of stability of the following three carbonium ions?
1 I $>$ II $>$ III
2 II $>$ I $>$ III
3 I $\approx$ III $>$ II
4 All are equally stable
Explanation:
Carbocation or carbonium ion is stabilized by + I effect and delocalization of electron delocalization of electron is dominating factor over the $+\mathrm{I}$ effect. Hence the order of stability is I $\approx$ III $>$ II.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
231306
Match the following |List-I (Species)|List-II (lone pairs)| |---|---| |(A) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$|(I) 2| |(B) $\mathrm{CH}_{3} \mathbf{C} \stackrel{\oplus}{\mathrm{O}}$|(II) 0| |(C) $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2} \mathrm{CH}_{3}$|(III) 1|
1 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { I } \text { III }\end{array}$
2 $\mathrm{A}$ B $\mathrm{C}$
3 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { IV } \text { III }\end{array}$
4 $\begin{array}{llc}\text { A } \text { B } \text { C } \\ \text { II } \text { II } \text { IV }\end{array}$
Explanation:
(B) :
07.08.2021 Shift-II]**
GENERAL ORGANIC CHEMISTRY
231309
The order of acidic strength of following acids is
1 (iii) $>$ (ii) $>$ (i)
2 (ii) $>$ (iii) $>$ (i)
3 (iii) $>$ (i) $>$ (ii)
4 (ii) $>$ (i) $>$ (iii)
Explanation:
(A) : Decreases acidity Increases acidity Aromatic carboxylic acids are stronger to aliphatic carboxylic acids. Acidic strength order - (iii) $>$ (ii) $>$ (i)
231302
The most stable carbanion among the following is:
1
2
3
4
Explanation:
Carbanion is stabilized by delocalization and $-\mathrm{I}$ effect, $+\mathrm{I}$ effect and $+\mathrm{M}$ effect decrease the stability of carbanion. Hence- It is most stable carbanion because it have -I effect by nitro group as well as delocalization. Hence 'd' option is correct. We can determine the order of stability
AIIMS-2012
GENERAL ORGANIC CHEMISTRY
231304
Which is the correct order of stability of the following three carbonium ions?
1 I $>$ II $>$ III
2 II $>$ I $>$ III
3 I $\approx$ III $>$ II
4 All are equally stable
Explanation:
Carbocation or carbonium ion is stabilized by + I effect and delocalization of electron delocalization of electron is dominating factor over the $+\mathrm{I}$ effect. Hence the order of stability is I $\approx$ III $>$ II.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
231306
Match the following |List-I (Species)|List-II (lone pairs)| |---|---| |(A) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$|(I) 2| |(B) $\mathrm{CH}_{3} \mathbf{C} \stackrel{\oplus}{\mathrm{O}}$|(II) 0| |(C) $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{2} \mathrm{CH}_{3}$|(III) 1|
1 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { I } \text { III }\end{array}$
2 $\mathrm{A}$ B $\mathrm{C}$
3 $\begin{array}{ccc}\text { A } \text { B } \text { C } \\ \text { I } \text { IV } \text { III }\end{array}$
4 $\begin{array}{llc}\text { A } \text { B } \text { C } \\ \text { II } \text { II } \text { IV }\end{array}$
Explanation:
(B) :
07.08.2021 Shift-II]**
GENERAL ORGANIC CHEMISTRY
231309
The order of acidic strength of following acids is
1 (iii) $>$ (ii) $>$ (i)
2 (ii) $>$ (iii) $>$ (i)
3 (iii) $>$ (i) $>$ (ii)
4 (ii) $>$ (i) $>$ (iii)
Explanation:
(A) : Decreases acidity Increases acidity Aromatic carboxylic acids are stronger to aliphatic carboxylic acids. Acidic strength order - (iii) $>$ (ii) $>$ (i)
