2. propane + bromine 3. benzene + chlorine 4. ethane + (2 mol) iodine 5. 2-butene + hydrogen 6. 2-pentene + hydrogen chloride 7. 1-hexene + fluorine 8. 4-methyl-2-hexene + water 9. 2-butyne + chlorine 10. 4,4-dimethyl-2-pentyne + bromine 11. 4,5-dimethyl-2-hexyne + (2 mol) water 12. butanoic acid + ethanol 13. propanoic acid + methanol 14. butanoic acid + 1-butanol 15. 3,3dimethyl pentanoic acid + 1-pentanol 16. chloroethane + potassium hydroxide 17. 2-bromobutane + potassium hydroxide 18. 1-fluoro-3-methylpentane + hydroxide 19. 2-butanol + acid catalyst 20. 2,3-dimethyl-1-butanol + acid catalyst