How the following conversions can be carried out?

Toluene to benzyl alcohol

How the following conversions can be carried out?

Benzene to $4-$bromonitrobenzene

How the following conversions can be carried out?

Benzyl alcohol to 2-phenylethanoic acid

How the following conversions can be carried out?

Ethanol to propanenitrile

How the following conversion can be carried out?

Aniline to chlorobenzene

How the following conversions can be carried out?

2-Chlorobutane to 3, 4-dimethylhexane

How the following conversions can be carried out?

2-Methyl-1-propene to 2-chloro-2-methylpropane

How the following conversion can be carried out?

Ethyl chloride to propanoic acid.

How the following conversion can be carried out?

But-$1$-ene to $\mathrm{n}$-butyliodide.