MCQ
The amine which can not prepared by Gabriels phthalmide synthesis method
- ✓$Ph-NH_2$
- B$Me-NH_2$
- C$i-pr-NH_2$
- D


Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$\begin{array}{*{20}{c}}
{C{H_3} - CH = C - C{H_2} - C{H_3}} \\
{|\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2} - C{H_2} - C{H_3}}
\end{array}$
| Complexes | No. of unpaired electron | ||
| $A$ | $[CrF_6]^{-4}$ | $P$ | $5$ |
| $B$ | $[MnF_6]^{-4}$ | $Q$ | $2$ |
| $C$ | $[Cr(CN)_6]^{-4}$ | $R$ | $1$ |
| $D$ | $[Mn(CN)_6]^{-4}$ | $S$ | $4$ |

$HCHO\xrightarrow[{dil{H_2}S{O_4}}]{{NaCN}}A\xrightarrow[{\operatorname{P} t}]{{{H_2}}}B$ The product $(B)$ is
