How the following conversions can be carried out?

Ethanol to but-1-yne

p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Discuss.

How the following conversions can be carried out?

Propene to propan-1-ol

How the following conversions can be carried out?

1-Bromopropane to 2-bromopropane

How the following conversions can be carried out?

Toluene to benzyl alcohol