The increasing order of pK_b for the followin | vedclass

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(C) The basic strength of amines is inversely proportional to their $pK_b$ values.$(B)$ is a bicyclic guanidine derivative,which is a very strong base

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$B < A < C$

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(C) The basic strength of amines is inversely proportional to their $pK_b$ values.$(B)$ is a bicyclic guanidine derivative,which is a very strong base due to the resonance stabilization of its conjugate acid.$(A)$ is formamidine,which is also resonance stabilized but less basic than the bicyclic guanidine.$(C)$ is dimethylamine,a secondary aliphatic amine,which is a weaker base compared to the resonance-stabilized guanidine derivatives.Thus,the order of basic strength is $(B) > (A) > (C)$.Since $pK_b$ is inversely proportional to basic strength,the increasing order of $pK_b$ is $(B) < (A) < (C)$.

The increasing order of $pK_b$ for the following compounds will be:
$(A)$ $NH_2-CH=NH$
$(B)$ $1,5,7-Triazabicyclo[4.4.0]dec-5-ene$
$(C)$ $(CH_3)_2NH$

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The increasing order of $pK_b$ for the following compounds will be:$(A)$ $NH_2-CH=NH$$(B)$ $1,5,7-Triazabicyclo[4.4.0]dec-5-ene$$(C)$ $(CH_3)_2NH$