Q.

Correct increasing order of Kb values for A = C2H5NH2  ;  B = C2H52NH;  C = C2H53N;  D = C6H5CH2NH2

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a

A, B, C, D

b

D, C, B, A

c

D, A, C, B

d

D, A, B, C

answer is C.

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Detailed Solution

In aqueous solutionKb ∝ OH−kb value depends on cumulative effect of inductive effect, H–bonding and steric factors.Kb of C2H52NH  >  C2H53N  >  C2H5NH2>  C6H5−CH2NH2                    B                                             C                                        A                                       D                  Increasing order will be D, A, C, B
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