CH3CH2Br+KOH→ alcohol CH2=CH2\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{KOH} \xrightarrow{\text { alcohol }} \mathrm{CH}_{2}=\mathrm{CH}_{2}CH3CH2Br+KOH alcohol CH2=CH2
CH2BrCH2Br+Zn⟶ΔCH2=CH2\mathrm{CH}_{2} \mathrm{BrCH}_{2} \mathrm{Br}+\mathrm{Zn} \stackrel{\Delta}{\longrightarrow} \mathrm{CH}_{2}=\mathrm{CH}_{2}CH2BrCH2Br+Zn⟶ΔCH2=CH2
CH3CH2Br+KOH+H2O→CH2CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{KOH}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}CH3CH2Br+KOH+H2O→CH2CH2OH
CH3COOH+Zn⟶ΔCH4+ZnO+CO\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{Zn} \stackrel{\Delta}{\longrightarrow} \mathrm{CH}_{4}+\mathrm{ZnO}+\mathrm{CO}CH3COOH+Zn⟶ΔCH4+ZnO+CO