MCQ
Which of the following has minimum $pK _{ b }$ value?
- ✓N-methyl methan amine
- BN,N-dimethyl methan amine
- CMethanamine
- DBenzenamine
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Reactent $(A)$ is
Assume Planck's constant $( h )=6.4 \times 10^{-34}\,Js$ Speed of light $( c )=3.0 \times 10^8\,m / s$ and Avogadro's constant $\left( N _{ A }\right)=6 \times 10^{23} / mol$
$A$ and $B$ are :

$CH_3-CH=O + C_6H_5-CH=O$ $\xrightarrow[\Delta ]{{\mathop O\limits^\Theta H(aq)}}$ $\mathop X\limits_{({C_4}{H_6}O)} $ $+$ $\mathop Y\limits_{({C_9}{H_8}O)} $
