How are primary, secondary and tertiary amines distinguished using ${\mathrm{HNO}}_2$?

What is the action of lithium aluminium hydride in the presence of ether on the following compounds?

Nitroethane

What is the action of lithium aluminium hydride in the presence of ether on the following compounds?

2-Methyl-1-nitropropane.

Complete and rewrite the balanced chemical equation for the following reactions:

$1-\mathrm{chloro}-2,4-\mathrm{dinitrobenzene}\underset{368 \mathrm{K}, {\mathrm{H}}^{+}}{\overset{\mathrm{aq}. \mathrm{alkali}}{\to }}?$

Write resonance structures of aniline. What is the action of benzene diazonium chloride on ethanol?