$\mathrm{NH}_2 \mathrm{CONH}_2+2 \mathrm{H}_2 \mathrm{O} \rightarrow[\mathrm{X}] \rightleftharpoons 2 \mathrm{NH}_3+\mathrm{H}_2 \mathrm{O}+[\mathrm{Y}]$

The hybridisation of carbon in $X$ and $Y$ respectively are

In the given reaction sequence sequence, $Z$ is

In the following reaction ' $C$ ' is an aromatic compound having substitutents $D$ and $E$. What are $D$ and $E$ ?

The correct order of $\mathrm{p} K_a$ of the following is

$$ \underset{\mathrm{I}}{\mathrm{CCl}_3 \mathrm{COOH}} \quad \underset{\mathrm{II}}{\mathrm{CF}_3 \mathrm{COOH}} $$

$$ \underset{\text { III }}{\mathrm{NO}_2 \mathrm{CH}_2 \mathrm{COOH}} \underset{\text { IV }}{\mathrm{NCCH}_2 \mathrm{COOH}} $$