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Chemistry
<img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/1261e5031adc13da6b746792d39476bc-.png /> The correct decreasing order of pKb is
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Q.
The correct decreasing order of $pK_b$ is
AIIMS
AIIMS 2011
Amines
A
I > II > III > IV
13%
B
III > IV > II > I
15%
C
II > III > IV > I
15%
D
IV > II > I > III
57%
Solution:
Substituent with strong $+$R effect, $+I$ effect and weaker $-I $ effect increases the basicity. Hence $PK_{b}$ decreases. Also, alkylamines are stronger bases than arylamines. So, the order is (d).
