JEE Main202429 Jan 2024Evening ShiftChemistryGeneral Organic ChemistryActual
Match List I with List II Choose the correct answer from the options given below:
Options
- AA-I, B-II, C-III, D-IV
- BA-IV, B-I, C-II, D-III
- CA-III, B-IV, C-I, D-II
- DA-II, B-I, C-IV, D-III
Correct answer
D. A-II, B-I, C-IV, D-III
Step-by-step solution
pK a = - logK a , here K a acid dissociation constant. More the K a value, stronger is the acidic nature of the respective acid. Hence, the lower pK a value denotes a more powerful acid. Phenols are more acidic than alcohols. Hence, ethanol has more pK a value. Nitro group is the electron withdrawing group, hence it increases the acidic nature of phenols. Among the given phenols para nitrophenol is stronger acid. The pK a values are matched below. Ethanol → 15 . 9 Phenol → 10 m - Nitrophenol → 8 . 3 p - Nitrophenol