Stogs GCSE Interleaving Crude Oil S

A hydrocarbon is:

• A compound made up of oxygen and hydrogen only.

• A compound made up of carbon and hydrogen only

• A compound made up of hydrogen and nitrogen only.

• A compound made up of carbon and oxygen only.

An isomer...

• ... has the same number of bonds.

• ... has the same number of atoms, but different elements.

• ... has the same number and type of atoms, but a different arrangement.

• ... has the same arrangement of atoms, but different numbers.

What is the general formula of the alkenes?

• C_nH_2n

• C_nH_2n+1

• C_nH_2n+2

• C_nH_2n+3

What is the formula of ethene?

• C₂H₆

• CH₆

• C₂H₄

• CH₄

What is the formula of propane?

• C₅H₁₀

• C₅H₁₂

• C₃H₆

• C₃H₈

A homologous series is a series of compounds which have:

• Same general formula.

• Differ by CH₂ in molecular formulae from neighbouring compounds.

• Show gradual variation in physical properties.

• Have similar chemical properties.

Crude oil can be separated into fractions by:

• Crystallisation

• Filtration

• Simple distillation

• Fractional distillation

Which fraction is used as a fuel for aircraft?

• Bitumen

• Kerosene

• Petrol

• Fuel oil

Which fraction is used as a fuel for large ships and in some power stations?

• Bitumen

• Kerosene

• Petrol

• Fuel oil

Select the correct statements.

• Fuel oil is a larger molecule than petrol.

• Fuel oil is more volatile than petrol.

• Fuel oil has a lower boiling point than petrol.

• Fuel oil is more viscous than petrol.