5.12 I can recall the problems associated with the fractional distillation of crude oil

Highlight the blank spaces for the answers

1. copy and complete:

 a. When crude oil undergoes fractional distillation there are too many long chain hydrocarbons (eg bitumen) produced and not enough short chain hydrocarbons (eg refinery gases)

b. To solve these problems the long chain hydrocarbons undergo a chemical reaction called cracking