MCQ
Highest value of $pK_b$ will be of :
- ✓$NH_3$
- B$(CH_3)_2NH$
- C$(CH_3)_3N$
- D$CH_3NH_2$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$\begin{array}{*{20}{c}}
{{\,\,R_1}} \\
| \\
{R - C - X} \\
| \\
{{\,\,R_2}}
\end{array}\xrightarrow{{HOH}}\begin{array}{*{20}{c}}
{{\,\,R_1}\,\,\,\,} \\
{|\,\,\,\,} \\
{R - C - OH} \\
{|\,\,\,\,\,} \\
{{\,\,R_2}\,\,\,\,}
\end{array}$
Which substrate will give maximum racemisation ?