JEE Main201912 Apr 2019Morning ShiftChemistryGeneral Organic ChemistryActual
The increasing order of the p K b of the following compund is: ( A ) ( B ) ( C ) ( D )
Options
- A( B ) < ( D ) < ( C ) < ( A )
- B( B ) < ( D ) < ( A ) < ( C )
- C( C ) < ( A ) < ( D ) < ( B )
- D( A ) < ( C ) < ( D ) < ( B )
Correct answer
B. ( B ) < ( D ) < ( A ) < ( C )
Step-by-step solution
p K b = - log ⁡ k b                     k b ↑ p k b ↓ Basic character in amine and its derivative α -ve charge density α availability of lone pair α + M     α   1 - M α + H C     α   1 - H C α + I     α   1 - I K b basic character B > D > A > ( C ) pK b = B < D < A < C