Amines

goals
Which is stronger acid in the following pair?
$2$-Nitrophenol and $2, 4, 6$-Trinitrophenol.
The correct order of boiling points of the following amines ${ C }_{ 4 }{ H }_{ 9 }{ NH }_{ 2 },\left( { C }_{ 2 }{ H }_{ 5 } \right) _{ 2 }NH,{ C }_{ 2 }{ H }_{ 5 }N\left( { CH }_{ 3 } \right) _{ 2 }$ is :
Chlorobenze gives aniline with
In the reaction shown, the major product(s) formed is/are:
Isopropylamine $\xrightarrow{KMnO_4} X \xrightarrow{H_3O^+}Y$.
In the above sequence $X$ and $Y$ are respectively