This document discusses alkanes, including their general formula, molecular formula, structural formula, and naming conventions. It also covers some of their physical properties like combustion and substitution reactions, where an alkane reacts with chlorine in the presence of UV light in a stepwise manner, replacing hydrogen atoms with chlorine atoms.

14. 1 2 3 propane

15. 1 2 3 4 n-butane

16. 1 2 3 4 5 n-pentane

18. 1 2 3 4 5 2- methylpentane

19. 1 2 3 4 5 2,4- dimethylpentane

23. SUBSTITUTION REACTION Example: Reaction of methane with chlorine in the presence of UV

27. Cl Cl

30. Cl Cl

32. C H H H H C H H H H

33. equation