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

Explanation

1. `underset("Propene")(CH_(3)CH=CH_(2)) underset("Peroxide")overset(HBr)to CH_(3)CH_(2)CH_(2)Br overset(aq. KOH)to underset("Propan-1-ol")(CH_(3)CH_(2)CH_(2)OH)`
2. `underset("Ethanol")(CH_(3)CH_(2)OH) underset(Delta)overset(P, I_(2))to CH_(3)CH_(2)I underset(Delta)overset(alc. KOH)to CH_(2)=CH_(2) overset(Br_(2) C Cl_(4))to underset(Br)underset(|)CH_(2)-underset(Br)underset(|)CH_(2) overset(NaNH_(2), liq. NH_(3))to HC-=CH underset(liq. NH_(3))overset(NaNH_(2))to Na^(+)C^(-)-=C^(-)Na^(+) underset("excess")overset(2CH_(3)I)to underset("But-2-yne")(CH_(3)C-=C-CH_(3))`
3. `underset("1-Bromopropane")(CH_(3)CH_(2)CH_(2)Br) underset(Delta)overset(alc. KOH)to CH_(3)CH=CH_(2) underset("Markovnikov rule")overset(HBr)to underset("2-Bromopropane")(CH_(3)underset(Br)underset(|)CH-CH_(3))`

9. `underset("2-Chlorobutane")(CH_(3)-underset(Cl)underset(|)CH-CH_(2)CH_(3)) underset("Wurtz reaction")overset(Na)to underset("3,4-Dimethylhexane")(CH_(3)-CH_(2)underset(CH_(3))underset(|)CH- underset(CH_(3))underset(|)CH-CH_(2)CH_(3))`
10. `underset("2-Methylpropene")(CH_(3)-overset(CH_(3))overset(|)C=CH_(2)) underset("Markovnikov addition")overset(HCl)to underset("2-Chloro-2-methylpropane")(CH_(3)-underset(Cl)underset(|)overset(CH_(3))overset(|)C-CH_(3))`
11. `underset("Ethyl chloride")(CH_(3)CH_(2)Cl) overset(alc. KCN)to CH_(3)CH_(2)CN underset("Hydrolysis")overset(H^(+), H_(2)O)to underset("Propanoic acid")(CH_(3)CH_(2)COOH)`
12. `underset("But-1-ene")(CH_(3)-CH_(2)-CH=CH_(2)) underset("Peroxide")overset(HBr)to CH_(3)CH_(2)CH_(2)CH_(2)Br underset("Acetone")overset(NaI)to underset("n-Butyl iodine")(CH_(3)CH_(2)CH_(2)CH_(2)I)`
13. `underset("2-Chloropropane")(CH_(3)underset(Cl)underset(|)CHCH_(3)) underset(Delta)overset(alc. KOH)to CH_(3)CH=CH_(2) underset("Peroxide")overset(HBr)to CH_(3)CH_(2)CH_(2)Br underset(Delta)overset(aq. KOH)to underset("Propan-1-ol")(CH_(3)CH_(2)CH_(2)OH)`
14. `underset("Isopropyl alcohol")(CH_(3)-underset(OH)underset(|)CH-CH_(3))+4I_(2)+6NaOH overset("Heat")to CHI_(3)+CH_(3)COONa+5NaI+5H_(2)O`