" (a) Ethanol to but-1-yne "

How the following conversions can be carried out? (i) Propene to propan-1-ol (ii) Ethanol to but-1-yne (iii) 1-Bromopropane to 2-bromopropane (iv) Toluene to benzyl alcohol (v) Benzene to 4-bromonitrobenzene (vi) Benzyl alcohol to 2-phenylethanoic acid (vii) Ethanol to propanenitrile (viii) Aniline to chlorobenzene (ix) 2-Chlorobutane to 3, 4-dimethylhexane (x) 2-Methyl-1-propene to 2-chloro-2-methylpropane (xi) Ethyl chloride to propanoic acid (xii) But-1-ene to n-butyliodide (xiii) 2-Chloropropane to 1-propanol (xiv) Isopropyl alcohol to iodoform (xv) Chlorobenzene to p-nitrophenol (xvi) 2-Bromopropane to 1-bromopropane (xvii) Chloroethane to butane (xviii) Benzene to diphenyl (xix) tert-Butyl bromide to isobutyl bromide (xx) Aniline to phenylisocyanide

How will you convert the following: (i) Isopropyl chloride to n-propyl chloride (ii) Methyl bromide to ethylamine (iii) Chlorobenzene to benzoic acid (iv) Methyl bromide to acetic acid (v) Propane to allyl chloride (vi) 1-Bromopropane to 2-bromopropane (vii) Propene to propyne (viii) Ethanol to but-1-yne

How will you bring about the following conversions? (i) ethanol to but - 1-yne.