Q13. Arrange the following compounds in decreasing order of acidity:
(A) o-cresol
(B) Phenol
(C) m-n

Q: What is the correct answer for CUET UG Chemistry Q13?

The correct answer is D. Acidity of phenols and alcohols is largely influenced by the stability of their conjugate base. Electron-withdrawing groups increase acidity, while electron-donating groups decrease it.-NO2 group is electron-withdrawing (-I and -M effect), increasing acidity.-CH3 group is electron-donating (+I and hyperconjugation effect), decreasing acidity.Comparing the compounds:(D) o-nitrophenol: NO2 group at

Q: Q13. Arrange the following compounds in decreasing order of acidity: (A) o-cresol (B) Phenol (C) m-nitrophenol (D) o-nitrophenol (E) Ethanol Choose the correct answer from the options given…

The correct answer is D. Acidity of phenols and alcohols is largely influenced by the stability of their conjugate base. Electron-withdrawing groups increase acidity, while electron-donating groups decrease it.-NO2 group is electron-withdrawing (-I and -M effect), increasing acidity.-CH3 group is electron-donating (+I and hyperconjugation effect), decreasing acidity.Comparing the compounds:(D) o-nitrophenol: NO2 group at

Q: What are the options for this CUET UG Chemistry question?

A. (a) D > B > C > E > A · B. (b) E > A > B > C > D · C. (c) C > D > A > B > E · D. (d) D > C > B > A > E

Question

Q13. Arrange the following compounds in decreasing order of acidity:
(A) o-cresol
(B) Phenol
(C) m-nitrophenol
(D) o-nitrophenol
(E) Ethanol
Choose the correct answer from the options given below:
(a) D > B > C > E > A
(b) E > A > B > C > D
(c) C > D > A > B > E
(d) D > C > B > A > E

FirstInTest · Accepted Answer

Acidity of phenols and alcohols is largely influenced by the stability of their conjugate base. Electron-withdrawing groups increase acidity, while electron-donating groups decrease it.-NO2 group is electron-withdrawing (-I and -M effect), increasing acidity.-CH3 group is electron-donating (+I and hyperconjugation effect), decreasing acidity.Comparing the compounds:(D) o-nitrophenol: NO2 group at ortho position, strong electron-withdrawing.(C) m-nitrophenol: NO2 group at meta position, significant -I effect, less -M effect than ortho/para.(B) Phenol: Reference point.(A) o-cresol: CH3 group at ortho position, electron-donating, decreases acidity compared to phenol.(E) Ethanol: Alcohols are generally much weaker acids than phenols.The general order of acidity for substituted phenols and alcohols is:Nitrophenols > Phenol > Cresols > Alcohols.Between o-nitrophenol and m-nitrophenol, o-nitrophenol is generally more acidic due to proximity of -I effect, though intramolecular H-bonding can slightly affect it in some solvents. Given the options, D is stronger than C.So, the decreasing order of acidity is: (D) o-nitrophenol > (C) m-nitrophenol > (B) Phenol > (A) o-cresol > (E) Ethanol.This matches option (d).

Answer

(a) D > B > C > E > A

Answer

(b) E > A > B > C > D

Answer

(c) C > D > A > B > E

Answer

(d) D > C > B > A > E

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