Which of the following is the formula for propane?
C3H6
C3H8
C3H10
Which balanced symbol equation shows the reaction of ethene with excess oxygen?
C2H4 + 3O2 -> 2CO2 + 2H2O
C2H4 + 2½O2 -> 2CO + 3H2O
C2H4 + 1½O2 -> 2C + 3H2O
Complete combustion of an alkene produces:
Carbon dioxide and water
Carbon monoxide and water
Carbon dioxide
Which of the following statements is incorrect about a homologous series?
They show the same chemical properties
Each member has an extra CH2 group
They show a gradation in physical properties
Butene has the formula:
C4H10
C4H8
C4H12
Which of the following statements about the fractional distillation of crude oil is true?
Each fraction contains a single compound.
Each fraction is separated due to having a different melting point.
Each fraction contains compounds with similar boiling points.
Combustion of fuels is a major source of what type of pollution?
Land
Sea
Air
An excess of carbon dioxide in the atmosphere leads to:
Global warming
Thunder storms
Hurricanes
Which of the following statements about polymerisation is false?
Alkane monomers join together in an addition polymerisation reaction.
Polymers are long-chain molecules made by joining monomers together
Polyvinyl chloride is made from the monomer called vinyl chloride
The correct chemical representation of polythene is:
CH3OH
CH4OH
CH2OH