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1 ethane → 1,1-dichloroethane → ethin → ethanal
2 calcium carbide → ethin → benzene →
cyclohexane → methylcyclopentane
3 cyclohexane → benzene → nitrobenzene →?
bromonitrobenzene
4 methane → Ethin → chloroethene → 1,1-
dichloroethane
5 methane → ethin → benzene → nitrobenzene
6 heptane → methylbenzene →? - chlorotoluene
7 calcium carbide → ethin → benzene →
methylbenzene
8 cyclohexane → benzene → bromobenzene →? -
bromonitrobenzene
9 ethin → benzene → chlorobenzene →
methylbenzene → benzoic acid
10 pentane → isopentane → isoprene
11 benzoic acid
12 ethen → ethin → ethanal
13 calcium carbide → ethin → benzene →
chlorobenzene →? - chloronitrobenzene
14 pentane → 1-chloropentane → 1,5-
dichloropentane → cyclopentane →
chlorocyclopentane
15 calcium carbide → ethin → benzene →
methylbenzene
16 cyclohexane → benzene → bromobenzene →? -
bromonitrobenzene
17 ethin → benzene → chlorobenzene →
methylbenzene → benzoic acid
18 pentane → isopentane → isoprene → isoprene
rubber
19 ethen → ethin → nitrobenzene → D -
dinitrobenzene
20 methane → ethin → cyanotene → propenic acid