11. Ethanol can be used as a fuel. The products formed in the complete combustion of ethanol are …
  • A.   carbon monoxide and hydrogen
  • B.   carbon monoxide and water
  • C.   carbon dioxide and hydrogen
  • D.   carbon dioxide and water

12. Ethanol is oxidized to compound Y when heated with potassium dichromate(VI) in dilute sulfuric acid. The name of compound Y is …

  • A.   carbon dioxide
  • B.   ethene
  • C.   ethyl ethanoate
  • D.   ethanoic acid

13. Ethanoic acid is a member of the homologous series of carboxylic acids. The structural formula and empirical formula of the fourth member of this series is …

  Structural formula Empirical formula
A CH3CH2CH2COOH C4H8O2
B CH3CH2CH2COOH C2H4O
C CH3CH2COOCH3 C4H8O2
D CH3CH2COOCH3 C2H4O
14. Ethanoic acid is regarded as a weak acid because it is …
  • A.   partially ionized in aqueous solution with an approximate pH of 1
  • B.   partially ionized in aqueous solution with an approximate pH of 4
  • C.   completely ionized in aqueous solution with an approximate pH of 1
  • D.   completely ionized in aqueous solution with an approximate pH of 4
15. Two observation that would be seen when solid sodium carbonate is added to ethanoic acid are …  
  Observation 1 Observation 2
A Solution turns from colourless to blue White solid appears
B Solution turns from blue to colourless White solid disappears
C Bubbles of gas White solid appears
D Bubbles of gas White solid disappears
16. Esters are volatile compounds with distinctive smells and can be used in perfumes.
The formula of an ester found in some fruits is shown below:

fruit ester

 perfume bottles

The names of the carboxylic acid and alcohol which reacted together to produce this ester are …

  • A.   propanoic acid and butanol
  • B.   butanoic acid and propanol
  • C.   pentanoic acid and ethanol
  • D.   ethanoic acid and butanol

17. Polyesters are condensation polymers produced for use in the garment industry.

The structures of two monomers that are used to make polyester are:

 polyester scarves

monomer 1monomer 2

The repeat unit of the polyester produced from these two monomers is:

organics2 polyester repeat units
18. The molecule shown here is obtained from corn starch and can be used to make a biodegradable polymer, PLA.
What functional groups does this molecule contain?
  • A.   alcohol and ester
  • B.   alcohol and carboxylic acid
  • C.   alcohol, carboxylic acid and ester
  • D.   carboxylic acid and ester

19. Crude oil can be converted to ethanoic acid as shown in the following flow chart:

Crude oil  → kerosene  → ethene  → ethanol  → ethanoic acid

The four processes used are:

  1. Cracking     2.  Hydration   3.   Fractional distillation   4.  Oxidation

In what order are these processes used?

  • A.   1,2,3,4
  • B.   1,3,2,4
  • C.   3,1,4,2
  • D.   3,1,2,4

20. Which of the following is NOT true?

  • A.   Amino acids react by condensation polymerisation to produce polypeptides
  • B.   Amino acids have one functional group
  • C.   Proteins are condensation polymers formed from different amino acids
  • D.   DNA is a polymer formed from four different monomers called nucleotides