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 + 3H2O
C2H4 + 2½O2 -> 2CO + 3H2O
C2H4 + 1½O2 -> 2C + 3H2O
The incomplete combustion of an alkane produces:
Carbon dioxide, carbon and water
Carbon, carbon monoxide and water
Carbon dioxide, carbon monoxide and water
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
Ethanoic acid has the formula:
CH3COOH
HCOOH
C2H5COOH
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.
The chemical test and observations to confirm an alkene is:
Universal indicator changes from orange from green
Bromine water changes from orange to colourless
Limewater, which changes from colourless to milky
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 molecular formula of methanol is
CH3OH
CH4OH
CH2OH