231236
Consider the following acids: I. II. III. What is the correct order of acidity ?
1 II $<$ I $<$ III
2 I $<$ II $<$ III
3 I $<$ III $<$ II
4 II $<$ III $<$ I
Explanation:
(A): Electron withdrawing group increase the acidic character and electron donating group decrease the acidic character so, the order is II $<$ I $<$ III
SCRA-2015
GENERAL ORGANIC CHEMISTRY
231242
The correct order of acidity (acid strength) of the following acids is
1 (I) $>$ (III) $>$ (IV) $>$ (II)
2 (III) $>$ (I) $>$ (IV) $>$ (II)
3 (III) $>$ (IV) $>$ (I) $>$ (II)
4 (IV) $>$ (III) $>$ (I) $>$ (II)
Explanation:
Inductive group increase acidic strength of compound - I order is $-\mathrm{NO}_{2}>\mathrm{CN}>\mathrm{CH}>\mathrm{COOH}>\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{OH}$ So correct order of acidity of following acid are -
TS EAMCET 10.08.2021
GENERAL ORGANIC CHEMISTRY
231244
Decreasing order of acidity of the following terminal acetylenes is
1 (i) $>$ (iii) $>$ (ii) $>$ (iv)
2 (i) $>$ (ii) $>$ (iv) $>$ (iii)
3 (i) $>$ (iv) $>$ (ii) $>$ (iii)
4 (i) $>$ (iii) $>$ (iv) $>$ (ii)
Explanation:
Let us consider the structure of respective conjugate bases (carbonions). (i) (ii) (iii) (iv) EWG (- R) stabilise carbanions but EDG (+ R > + I) destablise carbanions. [EWG : Electron withdrawing group EDG : Electron donating group] A stronger acid produces stable conjugate base. So, the order of acidity will be (i) > (ii) > (iv) > (iii)
AP EAMCET (Engg.) 17.09.2020 Shift-I
GENERAL ORGANIC CHEMISTRY
231245
Consider the following compounds : What is the correct order of decreasing of the acidity of the above compounds ?
1 $4>1>3>2$
2 $4>1>2>3$
3 $3>2>1>4$
4 $3>2>4>1$
Explanation:
The acidity of carboxylic acid depends on electronegative substituent attached to it. Electronegative substituent increases acidity by electron withdrawing. As higher the effect of electro-negativity of the atom higher the acidity and closer the substituent to the carboxyl group the greater is its effect. So, order will be -
SCRA - 2009
GENERAL ORGANIC CHEMISTRY
231246
Consider the following nucleophilic groups : 1. \(-\mathrm{O}-\mathrm{SO}_2-\mathrm{C}_6 \mathrm{H}_5\) 2. $O-CO-C{{H}_{3}}$ 3. $-\,Cl$ 4. \(-\mathrm{OCH}_3\) What is the correct order of leaving power of the above nucleophilic substitution reaction ?
1 $1>2>4>3$
2 $1>2>4>3$
3 $4>3>2>1$
4 $1>2>3>4$
Explanation:
With an increase in electronegativity, basicity decreases. Since, basicity increases in the order:- $\mathrm{OCH}_{3}<-\mathrm{Cl}<-\mathrm{O}-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}<-\mathrm{O}-\mathrm{SO}_{2}-\mathrm{C}_{6} \mathrm{H}_{5}$ Therefore, their leaving group ability decreases in the reverse order $-4>3>2>1$
231236
Consider the following acids: I. II. III. What is the correct order of acidity ?
1 II $<$ I $<$ III
2 I $<$ II $<$ III
3 I $<$ III $<$ II
4 II $<$ III $<$ I
Explanation:
(A): Electron withdrawing group increase the acidic character and electron donating group decrease the acidic character so, the order is II $<$ I $<$ III
SCRA-2015
GENERAL ORGANIC CHEMISTRY
231242
The correct order of acidity (acid strength) of the following acids is
1 (I) $>$ (III) $>$ (IV) $>$ (II)
2 (III) $>$ (I) $>$ (IV) $>$ (II)
3 (III) $>$ (IV) $>$ (I) $>$ (II)
4 (IV) $>$ (III) $>$ (I) $>$ (II)
Explanation:
Inductive group increase acidic strength of compound - I order is $-\mathrm{NO}_{2}>\mathrm{CN}>\mathrm{CH}>\mathrm{COOH}>\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{OH}$ So correct order of acidity of following acid are -
TS EAMCET 10.08.2021
GENERAL ORGANIC CHEMISTRY
231244
Decreasing order of acidity of the following terminal acetylenes is
1 (i) $>$ (iii) $>$ (ii) $>$ (iv)
2 (i) $>$ (ii) $>$ (iv) $>$ (iii)
3 (i) $>$ (iv) $>$ (ii) $>$ (iii)
4 (i) $>$ (iii) $>$ (iv) $>$ (ii)
Explanation:
Let us consider the structure of respective conjugate bases (carbonions). (i) (ii) (iii) (iv) EWG (- R) stabilise carbanions but EDG (+ R > + I) destablise carbanions. [EWG : Electron withdrawing group EDG : Electron donating group] A stronger acid produces stable conjugate base. So, the order of acidity will be (i) > (ii) > (iv) > (iii)
AP EAMCET (Engg.) 17.09.2020 Shift-I
GENERAL ORGANIC CHEMISTRY
231245
Consider the following compounds : What is the correct order of decreasing of the acidity of the above compounds ?
1 $4>1>3>2$
2 $4>1>2>3$
3 $3>2>1>4$
4 $3>2>4>1$
Explanation:
The acidity of carboxylic acid depends on electronegative substituent attached to it. Electronegative substituent increases acidity by electron withdrawing. As higher the effect of electro-negativity of the atom higher the acidity and closer the substituent to the carboxyl group the greater is its effect. So, order will be -
SCRA - 2009
GENERAL ORGANIC CHEMISTRY
231246
Consider the following nucleophilic groups : 1. \(-\mathrm{O}-\mathrm{SO}_2-\mathrm{C}_6 \mathrm{H}_5\) 2. $O-CO-C{{H}_{3}}$ 3. $-\,Cl$ 4. \(-\mathrm{OCH}_3\) What is the correct order of leaving power of the above nucleophilic substitution reaction ?
1 $1>2>4>3$
2 $1>2>4>3$
3 $4>3>2>1$
4 $1>2>3>4$
Explanation:
With an increase in electronegativity, basicity decreases. Since, basicity increases in the order:- $\mathrm{OCH}_{3}<-\mathrm{Cl}<-\mathrm{O}-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}<-\mathrm{O}-\mathrm{SO}_{2}-\mathrm{C}_{6} \mathrm{H}_{5}$ Therefore, their leaving group ability decreases in the reverse order $-4>3>2>1$
231236
Consider the following acids: I. II. III. What is the correct order of acidity ?
1 II $<$ I $<$ III
2 I $<$ II $<$ III
3 I $<$ III $<$ II
4 II $<$ III $<$ I
Explanation:
(A): Electron withdrawing group increase the acidic character and electron donating group decrease the acidic character so, the order is II $<$ I $<$ III
SCRA-2015
GENERAL ORGANIC CHEMISTRY
231242
The correct order of acidity (acid strength) of the following acids is
1 (I) $>$ (III) $>$ (IV) $>$ (II)
2 (III) $>$ (I) $>$ (IV) $>$ (II)
3 (III) $>$ (IV) $>$ (I) $>$ (II)
4 (IV) $>$ (III) $>$ (I) $>$ (II)
Explanation:
Inductive group increase acidic strength of compound - I order is $-\mathrm{NO}_{2}>\mathrm{CN}>\mathrm{CH}>\mathrm{COOH}>\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{OH}$ So correct order of acidity of following acid are -
TS EAMCET 10.08.2021
GENERAL ORGANIC CHEMISTRY
231244
Decreasing order of acidity of the following terminal acetylenes is
1 (i) $>$ (iii) $>$ (ii) $>$ (iv)
2 (i) $>$ (ii) $>$ (iv) $>$ (iii)
3 (i) $>$ (iv) $>$ (ii) $>$ (iii)
4 (i) $>$ (iii) $>$ (iv) $>$ (ii)
Explanation:
Let us consider the structure of respective conjugate bases (carbonions). (i) (ii) (iii) (iv) EWG (- R) stabilise carbanions but EDG (+ R > + I) destablise carbanions. [EWG : Electron withdrawing group EDG : Electron donating group] A stronger acid produces stable conjugate base. So, the order of acidity will be (i) > (ii) > (iv) > (iii)
AP EAMCET (Engg.) 17.09.2020 Shift-I
GENERAL ORGANIC CHEMISTRY
231245
Consider the following compounds : What is the correct order of decreasing of the acidity of the above compounds ?
1 $4>1>3>2$
2 $4>1>2>3$
3 $3>2>1>4$
4 $3>2>4>1$
Explanation:
The acidity of carboxylic acid depends on electronegative substituent attached to it. Electronegative substituent increases acidity by electron withdrawing. As higher the effect of electro-negativity of the atom higher the acidity and closer the substituent to the carboxyl group the greater is its effect. So, order will be -
SCRA - 2009
GENERAL ORGANIC CHEMISTRY
231246
Consider the following nucleophilic groups : 1. \(-\mathrm{O}-\mathrm{SO}_2-\mathrm{C}_6 \mathrm{H}_5\) 2. $O-CO-C{{H}_{3}}$ 3. $-\,Cl$ 4. \(-\mathrm{OCH}_3\) What is the correct order of leaving power of the above nucleophilic substitution reaction ?
1 $1>2>4>3$
2 $1>2>4>3$
3 $4>3>2>1$
4 $1>2>3>4$
Explanation:
With an increase in electronegativity, basicity decreases. Since, basicity increases in the order:- $\mathrm{OCH}_{3}<-\mathrm{Cl}<-\mathrm{O}-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}<-\mathrm{O}-\mathrm{SO}_{2}-\mathrm{C}_{6} \mathrm{H}_{5}$ Therefore, their leaving group ability decreases in the reverse order $-4>3>2>1$
231236
Consider the following acids: I. II. III. What is the correct order of acidity ?
1 II $<$ I $<$ III
2 I $<$ II $<$ III
3 I $<$ III $<$ II
4 II $<$ III $<$ I
Explanation:
(A): Electron withdrawing group increase the acidic character and electron donating group decrease the acidic character so, the order is II $<$ I $<$ III
SCRA-2015
GENERAL ORGANIC CHEMISTRY
231242
The correct order of acidity (acid strength) of the following acids is
1 (I) $>$ (III) $>$ (IV) $>$ (II)
2 (III) $>$ (I) $>$ (IV) $>$ (II)
3 (III) $>$ (IV) $>$ (I) $>$ (II)
4 (IV) $>$ (III) $>$ (I) $>$ (II)
Explanation:
Inductive group increase acidic strength of compound - I order is $-\mathrm{NO}_{2}>\mathrm{CN}>\mathrm{CH}>\mathrm{COOH}>\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{OH}$ So correct order of acidity of following acid are -
TS EAMCET 10.08.2021
GENERAL ORGANIC CHEMISTRY
231244
Decreasing order of acidity of the following terminal acetylenes is
1 (i) $>$ (iii) $>$ (ii) $>$ (iv)
2 (i) $>$ (ii) $>$ (iv) $>$ (iii)
3 (i) $>$ (iv) $>$ (ii) $>$ (iii)
4 (i) $>$ (iii) $>$ (iv) $>$ (ii)
Explanation:
Let us consider the structure of respective conjugate bases (carbonions). (i) (ii) (iii) (iv) EWG (- R) stabilise carbanions but EDG (+ R > + I) destablise carbanions. [EWG : Electron withdrawing group EDG : Electron donating group] A stronger acid produces stable conjugate base. So, the order of acidity will be (i) > (ii) > (iv) > (iii)
AP EAMCET (Engg.) 17.09.2020 Shift-I
GENERAL ORGANIC CHEMISTRY
231245
Consider the following compounds : What is the correct order of decreasing of the acidity of the above compounds ?
1 $4>1>3>2$
2 $4>1>2>3$
3 $3>2>1>4$
4 $3>2>4>1$
Explanation:
The acidity of carboxylic acid depends on electronegative substituent attached to it. Electronegative substituent increases acidity by electron withdrawing. As higher the effect of electro-negativity of the atom higher the acidity and closer the substituent to the carboxyl group the greater is its effect. So, order will be -
SCRA - 2009
GENERAL ORGANIC CHEMISTRY
231246
Consider the following nucleophilic groups : 1. \(-\mathrm{O}-\mathrm{SO}_2-\mathrm{C}_6 \mathrm{H}_5\) 2. $O-CO-C{{H}_{3}}$ 3. $-\,Cl$ 4. \(-\mathrm{OCH}_3\) What is the correct order of leaving power of the above nucleophilic substitution reaction ?
1 $1>2>4>3$
2 $1>2>4>3$
3 $4>3>2>1$
4 $1>2>3>4$
Explanation:
With an increase in electronegativity, basicity decreases. Since, basicity increases in the order:- $\mathrm{OCH}_{3}<-\mathrm{Cl}<-\mathrm{O}-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}<-\mathrm{O}-\mathrm{SO}_{2}-\mathrm{C}_{6} \mathrm{H}_{5}$ Therefore, their leaving group ability decreases in the reverse order $-4>3>2>1$
231236
Consider the following acids: I. II. III. What is the correct order of acidity ?
1 II $<$ I $<$ III
2 I $<$ II $<$ III
3 I $<$ III $<$ II
4 II $<$ III $<$ I
Explanation:
(A): Electron withdrawing group increase the acidic character and electron donating group decrease the acidic character so, the order is II $<$ I $<$ III
SCRA-2015
GENERAL ORGANIC CHEMISTRY
231242
The correct order of acidity (acid strength) of the following acids is
1 (I) $>$ (III) $>$ (IV) $>$ (II)
2 (III) $>$ (I) $>$ (IV) $>$ (II)
3 (III) $>$ (IV) $>$ (I) $>$ (II)
4 (IV) $>$ (III) $>$ (I) $>$ (II)
Explanation:
Inductive group increase acidic strength of compound - I order is $-\mathrm{NO}_{2}>\mathrm{CN}>\mathrm{CH}>\mathrm{COOH}>\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{OH}$ So correct order of acidity of following acid are -
TS EAMCET 10.08.2021
GENERAL ORGANIC CHEMISTRY
231244
Decreasing order of acidity of the following terminal acetylenes is
1 (i) $>$ (iii) $>$ (ii) $>$ (iv)
2 (i) $>$ (ii) $>$ (iv) $>$ (iii)
3 (i) $>$ (iv) $>$ (ii) $>$ (iii)
4 (i) $>$ (iii) $>$ (iv) $>$ (ii)
Explanation:
Let us consider the structure of respective conjugate bases (carbonions). (i) (ii) (iii) (iv) EWG (- R) stabilise carbanions but EDG (+ R > + I) destablise carbanions. [EWG : Electron withdrawing group EDG : Electron donating group] A stronger acid produces stable conjugate base. So, the order of acidity will be (i) > (ii) > (iv) > (iii)
AP EAMCET (Engg.) 17.09.2020 Shift-I
GENERAL ORGANIC CHEMISTRY
231245
Consider the following compounds : What is the correct order of decreasing of the acidity of the above compounds ?
1 $4>1>3>2$
2 $4>1>2>3$
3 $3>2>1>4$
4 $3>2>4>1$
Explanation:
The acidity of carboxylic acid depends on electronegative substituent attached to it. Electronegative substituent increases acidity by electron withdrawing. As higher the effect of electro-negativity of the atom higher the acidity and closer the substituent to the carboxyl group the greater is its effect. So, order will be -
SCRA - 2009
GENERAL ORGANIC CHEMISTRY
231246
Consider the following nucleophilic groups : 1. \(-\mathrm{O}-\mathrm{SO}_2-\mathrm{C}_6 \mathrm{H}_5\) 2. $O-CO-C{{H}_{3}}$ 3. $-\,Cl$ 4. \(-\mathrm{OCH}_3\) What is the correct order of leaving power of the above nucleophilic substitution reaction ?
1 $1>2>4>3$
2 $1>2>4>3$
3 $4>3>2>1$
4 $1>2>3>4$
Explanation:
With an increase in electronegativity, basicity decreases. Since, basicity increases in the order:- $\mathrm{OCH}_{3}<-\mathrm{Cl}<-\mathrm{O}-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}<-\mathrm{O}-\mathrm{SO}_{2}-\mathrm{C}_{6} \mathrm{H}_{5}$ Therefore, their leaving group ability decreases in the reverse order $-4>3>2>1$
