5.12 I can recall the problems associated with fractional distillation of Crude Oil

a. When crude oil undergoes __________ ____________ there are too many_____ chain hydrocarbons (eg _________)produced and not enough ______chain hydrocarbons (eg ________)

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

Image taken from 'Chemistry4You' text book.