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- The increasing order of pKb for the following compounds will be: Option: 1 (b)<(c)<(a)
The increasing order of pKb for the following compounds will be: 
Option: 1 (b)<(c)<(a)
Option: 2(c)<(a)<(b)
Option: 3 (b)<(c)<(a)
Option: 4 (c) > (a) > (b)
Answers (1)
As we have learnt,
So, as increases,
decreases.
The conjugate acid of guanidine is most resonance stabilized followed by imidine.
Thus, the increasing order of basicity is:
(b) > (a) > (c)
pKb order is given as:
(c) > (a) > (b)
Therefore, Option(4) is correct.
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