Chemistry C9 and C10 recap

Which of the following is unsaturated hydrocarbon ?

• propane

• propene

• propanol

• propanoic acid

A homologous series is a family of organic compounds with

• similar chemical properties and same general formula

• similar chemical properties and different general formula

• different chemical properties and same general formula

• similar physical properties and same general formula

State the general formula for alkane

• C_nH_2n+2

• C_nH_2n

• C_nH_2n+1

• C_nH_2n-2

Which are the following are all alkanes?

• methane, ethane, propane

• methane, ethene, propene

• methene, ethene, propene

• ethene, propene, butene

The formula for propane is

• C₂H₄

• C₂H₆

• C₃H₈

• C₃H₆

Which of the following shows the structure of ethane?

• 
• 
• 
• 

Crude oil is made up of:

• Ethane

• Butane

• A mixture of different hydrocarbons

• Extremely large hydrocarbons which are broken up once extracted

A fraction of crude oil is made up of:

• Hydrocarbons of similar chain lengths

• Numbers

• Large hydrocarbons

• Alkenes only

Different fractions in crude oil are separated by:

• Cracking

• Fractional Distillation

• Filtration

• Crystalisation

Shorter hydrocarbons have:

• Higher boiling points

• Lower boiling points