Crude oil is a finite resource. Petrol and other fuels are produced from it by fractional distillation. These fuels are non-renewable resources. Cracking helps match supply of fractions with demand.
What are the main substances found in crude oil?
In the fractional distillation of crude oil, where is the hottest part of the fractionating column?
Which fraction leaves the fractionating column at the very bottom?
Where do the shortest hydrocarbon molecules condense?
At the top of the column
They do not condense at all and remain as a gas
At the bottom of the column
Which fractions are the most difficult to ignite?
The ones that leave near the top of the column
The ones with the smallest molecules
The ones with the largest molecules
What is the general formula for the alkanes?
What conditions are used for cracking?
Low temperature, no catalyst
Low temperature, catalyst
High temperature, catalyst
What are the typical products of cracking?
Shorter alkanes and alkenes
A variety of short alkenes
Which statement about alkanes and alkenes is correct?
Alkanes are saturated and alkenes are unsaturated
Alkanes are unsaturated and alkenes are saturated
Alkanes and alkenes are saturated
Which process helps to match supply of oil fractions with the demand for them?