Where does fractional distillation take place?
Fractionating column
Fractionating tank
Fractionating pipe
Where is the coolest part of a fractionating column?
Bottom
Middle
Top
Which fraction of crude oil remains in the liquid state during the fractional distillation process?
Petrol
Heavy gas oil (fuel oil)
Bitumen
Which fraction of crude oil has the shortest hydrocarbon molecules?
Kerosene
Petroleum gas
Light gas oil (diesel)
Which force determines the boiling point of the hydrocarbon molecules?
Covalent bonds
Intermolecular forces
Gravitational
What is the general formula of an alkane?
CnH2n+2
CnH2n
CnH2n+1
What is the molecular formula of butane?
C4H8
C4H10
C3H8
As the length of the carbon chain in the alkanes increases, which of the following is true?
Boiling point and flammability decrease
Boiling point and flammability increase
Boiling point increases but flammability decreases
What type of hydrocarbon is produced by cracking?
Shorter alkanes and alkynes
Shorter alkanes and alkenes
Longer alkanes and alkenes
What is the empirical formula of octane (molecular formula C8H18)?
C2H9
C4H9