Product P is

Product P is

1. $\left(\mathrm{CH}_{3}ight)_{3} \mathrm{CNH}_{2}$
2. $\left(\mathrm{CH}_{3}ight)_{3} \mathrm{CNHD}$
3. $\left(\mathrm{CH}_{3}ight)_{3} \mathrm{CND}_{2}$
4. no reaction

Solution

Remember that in Hofmann rearrangement, the two original $\mathrm{H}$ atoms of the $-\mathrm{CONH}_{2}$ group are removed by base $\left(\mathrm{OH}^{-}ight)$ and new H's are derived from $\mathrm{H}_{2} \mathrm{O}$.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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