Urea on slow heating gives:

What is the final product of the reaction sequence: $C_2H_5NH_2$ $\xrightarrow{HNO_2} A$ $\xrightarrow{PCl_5} B$ $\xrightarrow{NH_3} C$?

Which of the following compounds reacts with $CHCl_3$ and $KOH$ to produce an isocyanide?

In the given carbylamine reaction,the value of $x$ (moles of $KOH$ consumed) is:
$C_6H_5NH_2 + CHCl_3 + xKOH \rightarrow C_6H_5NC + 3KCl + 3H_2O$

Identify $X$ in the reaction:
$p$-chloroaniline $\xrightarrow[\text{heat}]{CHCl_3/KOH}$ Intermediate $\xrightarrow[300 \ K]{HCl}$ $X$

$C_6H_5NH_2 \xrightarrow{Br_2/CCl_4} ?$
What is the product?