obtaining useful substances from crude oil

Question 1

Why are long chain hydrocarbons cracked to give fuels, and not used as fuels themselves? Select all options that apply.

Answer 1

They are difficult to vaporise

Question 2

Which of these resources is not obtained from crude oil?

Answer 2

Poly(lactic acid) plastic

Question 3

The process of cracking breaks long chain hydrocarbons from crude oil into smaller, more useful products.

what is a method used to crack hydrocarbons.

Answer 3

Hot steam

Question 4

A student is trying to split paraffin into smaller hydrocarbons using a cracking reaction. The student heats the paraffin and passes the vapour over hot pieces of pot, which acts as a catalyst. The student wants to know if the experiment works and decides to do a test for the presence of unsaturated products (alkenes). To do this, the student collects the gas produced in a tube and adds bromine water.

If unsaturated hydrocarbons are present, what would the student see?

Answer 4

The bromine water would turn from orange to colourless

Question 5

What is an alternative use for the heavy crude oil fractions used for cracking?

Answer 5

Making road surfaces