NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231496
Which of the following order is true regarding the acidic nature of phenol?
1 Phenol $<$ O-cresol $<$ O-nitrophenol
2 Phenol $>$ O-cresol $>$ O-nitrophenol
3 Phenol $<$ O-cresol $>$ O-nitrophenol
4 O-cresol $<$ phenol $<$ O-nitrophenol
Explanation:
(D) : Alkyl group have $+\mathrm{I}$ effect and $+\mathrm{I}-$ effect decrease the acidity and Nitro group have -I-effect and-I-effect increase the acidity. Hence order of acidity is - O-cresol $<$ Phenol $<$ O-nitro phenol. Hence, option (d) is correct.
Karnataka CET-2017
GENERAL ORGANIC CHEMISTRY
231501
Arrange the following compounds in the increasing order of their acidic strength. I. m-nitrophenol II. m-cresol III. Phenol IV. m-chlorophenol
1 III $<$ II $<$ I $<$ IV
2 II $<$ IV $<$ III $<$ I
3 II $<$ III $<$ IV $<$ I
4 II $<$ III $<$ I $<$ IV
Explanation:
+I effect always decrease the acidity of phenol. Thus, m-cresol is lowest acidity, -I effect always increase the acidity of phenol. Hence $\mathrm{m}$-nitrophenol is most acidic in nature. Therefore order of acidity is -
Karnataka CET-2015
GENERAL ORGANIC CHEMISTRY
231503
Which of the following is strongly acidic?
1 Phenol
2 o-cresol
3 p-nitrophenol
4 p-cresol
Explanation:
As we know that $+\mathrm{I}$-effect decreases the acidity of phenol and -I-effect is increase the acidity of phenol and also we know that the inductive effect is distance dependent. If distance of group to $\mathrm{C}$ increase, the $+\mathrm{I}$ effect is decrease. Hence, the order of acidity is - Hence, p-nitro phenol is most acidic so option (c) is correct.
Karnataka CET-2013
GENERAL ORGANIC CHEMISTRY
231504
Which one of the following is not true regarding electromeric effect?
1 It is a temporary effect
2 It operates on multiple bonds
3 It requires an attacking reagent
4 It results in the appearance of partial charges on the carbon atoms
Explanation:
It results in the appearance of partial charges on the carbon atoms is not true regarding electromeric effect. The electromeric effect is a temporary effect in which dipole moment is created instantly in a molecule due to the complete transfer of a pi-electron pair by the influence of attacking reagent, electrophile or a Nucleophile.
231496
Which of the following order is true regarding the acidic nature of phenol?
1 Phenol $<$ O-cresol $<$ O-nitrophenol
2 Phenol $>$ O-cresol $>$ O-nitrophenol
3 Phenol $<$ O-cresol $>$ O-nitrophenol
4 O-cresol $<$ phenol $<$ O-nitrophenol
Explanation:
(D) : Alkyl group have $+\mathrm{I}$ effect and $+\mathrm{I}-$ effect decrease the acidity and Nitro group have -I-effect and-I-effect increase the acidity. Hence order of acidity is - O-cresol $<$ Phenol $<$ O-nitro phenol. Hence, option (d) is correct.
Karnataka CET-2017
GENERAL ORGANIC CHEMISTRY
231501
Arrange the following compounds in the increasing order of their acidic strength. I. m-nitrophenol II. m-cresol III. Phenol IV. m-chlorophenol
1 III $<$ II $<$ I $<$ IV
2 II $<$ IV $<$ III $<$ I
3 II $<$ III $<$ IV $<$ I
4 II $<$ III $<$ I $<$ IV
Explanation:
+I effect always decrease the acidity of phenol. Thus, m-cresol is lowest acidity, -I effect always increase the acidity of phenol. Hence $\mathrm{m}$-nitrophenol is most acidic in nature. Therefore order of acidity is -
Karnataka CET-2015
GENERAL ORGANIC CHEMISTRY
231503
Which of the following is strongly acidic?
1 Phenol
2 o-cresol
3 p-nitrophenol
4 p-cresol
Explanation:
As we know that $+\mathrm{I}$-effect decreases the acidity of phenol and -I-effect is increase the acidity of phenol and also we know that the inductive effect is distance dependent. If distance of group to $\mathrm{C}$ increase, the $+\mathrm{I}$ effect is decrease. Hence, the order of acidity is - Hence, p-nitro phenol is most acidic so option (c) is correct.
Karnataka CET-2013
GENERAL ORGANIC CHEMISTRY
231504
Which one of the following is not true regarding electromeric effect?
1 It is a temporary effect
2 It operates on multiple bonds
3 It requires an attacking reagent
4 It results in the appearance of partial charges on the carbon atoms
Explanation:
It results in the appearance of partial charges on the carbon atoms is not true regarding electromeric effect. The electromeric effect is a temporary effect in which dipole moment is created instantly in a molecule due to the complete transfer of a pi-electron pair by the influence of attacking reagent, electrophile or a Nucleophile.
231496
Which of the following order is true regarding the acidic nature of phenol?
1 Phenol $<$ O-cresol $<$ O-nitrophenol
2 Phenol $>$ O-cresol $>$ O-nitrophenol
3 Phenol $<$ O-cresol $>$ O-nitrophenol
4 O-cresol $<$ phenol $<$ O-nitrophenol
Explanation:
(D) : Alkyl group have $+\mathrm{I}$ effect and $+\mathrm{I}-$ effect decrease the acidity and Nitro group have -I-effect and-I-effect increase the acidity. Hence order of acidity is - O-cresol $<$ Phenol $<$ O-nitro phenol. Hence, option (d) is correct.
Karnataka CET-2017
GENERAL ORGANIC CHEMISTRY
231501
Arrange the following compounds in the increasing order of their acidic strength. I. m-nitrophenol II. m-cresol III. Phenol IV. m-chlorophenol
1 III $<$ II $<$ I $<$ IV
2 II $<$ IV $<$ III $<$ I
3 II $<$ III $<$ IV $<$ I
4 II $<$ III $<$ I $<$ IV
Explanation:
+I effect always decrease the acidity of phenol. Thus, m-cresol is lowest acidity, -I effect always increase the acidity of phenol. Hence $\mathrm{m}$-nitrophenol is most acidic in nature. Therefore order of acidity is -
Karnataka CET-2015
GENERAL ORGANIC CHEMISTRY
231503
Which of the following is strongly acidic?
1 Phenol
2 o-cresol
3 p-nitrophenol
4 p-cresol
Explanation:
As we know that $+\mathrm{I}$-effect decreases the acidity of phenol and -I-effect is increase the acidity of phenol and also we know that the inductive effect is distance dependent. If distance of group to $\mathrm{C}$ increase, the $+\mathrm{I}$ effect is decrease. Hence, the order of acidity is - Hence, p-nitro phenol is most acidic so option (c) is correct.
Karnataka CET-2013
GENERAL ORGANIC CHEMISTRY
231504
Which one of the following is not true regarding electromeric effect?
1 It is a temporary effect
2 It operates on multiple bonds
3 It requires an attacking reagent
4 It results in the appearance of partial charges on the carbon atoms
Explanation:
It results in the appearance of partial charges on the carbon atoms is not true regarding electromeric effect. The electromeric effect is a temporary effect in which dipole moment is created instantly in a molecule due to the complete transfer of a pi-electron pair by the influence of attacking reagent, electrophile or a Nucleophile.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
GENERAL ORGANIC CHEMISTRY
231496
Which of the following order is true regarding the acidic nature of phenol?
1 Phenol $<$ O-cresol $<$ O-nitrophenol
2 Phenol $>$ O-cresol $>$ O-nitrophenol
3 Phenol $<$ O-cresol $>$ O-nitrophenol
4 O-cresol $<$ phenol $<$ O-nitrophenol
Explanation:
(D) : Alkyl group have $+\mathrm{I}$ effect and $+\mathrm{I}-$ effect decrease the acidity and Nitro group have -I-effect and-I-effect increase the acidity. Hence order of acidity is - O-cresol $<$ Phenol $<$ O-nitro phenol. Hence, option (d) is correct.
Karnataka CET-2017
GENERAL ORGANIC CHEMISTRY
231501
Arrange the following compounds in the increasing order of their acidic strength. I. m-nitrophenol II. m-cresol III. Phenol IV. m-chlorophenol
1 III $<$ II $<$ I $<$ IV
2 II $<$ IV $<$ III $<$ I
3 II $<$ III $<$ IV $<$ I
4 II $<$ III $<$ I $<$ IV
Explanation:
+I effect always decrease the acidity of phenol. Thus, m-cresol is lowest acidity, -I effect always increase the acidity of phenol. Hence $\mathrm{m}$-nitrophenol is most acidic in nature. Therefore order of acidity is -
Karnataka CET-2015
GENERAL ORGANIC CHEMISTRY
231503
Which of the following is strongly acidic?
1 Phenol
2 o-cresol
3 p-nitrophenol
4 p-cresol
Explanation:
As we know that $+\mathrm{I}$-effect decreases the acidity of phenol and -I-effect is increase the acidity of phenol and also we know that the inductive effect is distance dependent. If distance of group to $\mathrm{C}$ increase, the $+\mathrm{I}$ effect is decrease. Hence, the order of acidity is - Hence, p-nitro phenol is most acidic so option (c) is correct.
Karnataka CET-2013
GENERAL ORGANIC CHEMISTRY
231504
Which one of the following is not true regarding electromeric effect?
1 It is a temporary effect
2 It operates on multiple bonds
3 It requires an attacking reagent
4 It results in the appearance of partial charges on the carbon atoms
Explanation:
It results in the appearance of partial charges on the carbon atoms is not true regarding electromeric effect. The electromeric effect is a temporary effect in which dipole moment is created instantly in a molecule due to the complete transfer of a pi-electron pair by the influence of attacking reagent, electrophile or a Nucleophile.
