Heating the acyl azide in dry toluene under reflux for $3-$ hours give a $90\%$ yield for a heterocyclic product. Identify the product $(A)$.
- A
- B
- C
- D
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[Use: Molar mass (in g mol ${ }^{-1}$ ): $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{Br}=80, \mathrm{Cl}=35.5$
Atoms other than $\mathrm{C}$ and $\mathrm{H}$ are considered as heteroatoms]
($2$)The total number of carbon atoms and heteroatoms present in one molecule of $S$. . . . . .
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Atoms other than $\mathrm{C}$ and $\mathrm{H}$ are considered as heteroatoms
Give the answer quetion ($1$) and ($2$)
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$R-NH_2$ $\xrightarrow[{HCl}]{{NaN{O_2}}}$ $..................$
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