CIE IGCSE Chemistry

Topic Questions

IGCSEChemistryCIETopic Questions11. Organic Chemistry11.2 Organic Families

11.2 Organic Families

DownloadView
Easy
Medium
Hard
Easy
Medium
Hard
11 mark

Which of the equations show the incomplete combustion of methane?

  • 2 CH4 + 4O2  → 2 CO2 + 4 H2O

  • CH4 + O2  → C + 2 H2O

  • CH4 + O2  → C + 2 H2

  • 2 CH4 + 4 O2  → 2 CO2 + 4 H2

Choose your answer

Did this page help you?

21 mark

The diagram shows an industrial process involved in the production of a substance that is used as an aircraft fuel.

q2-11-2-easy-cie-igcse-chemistry

  process substance Q
A fractional distillation petrol
B thermal decomposition paraffin
C fractional distillation paraffin
D thermal decomposition petrol

Choose your answer

Did this page help you?

31 mark

Which of the following statements about ethanol is not correct?

  • It is formed by a reaction between steam and ethane.

  • It can be used as a fuel.

  • It can be used as a solvent.

  • Its functional group is -OH.

Choose your answer

Did this page help you?

41 mark

Butene and octene belong to the same homologous series.

What would be the same for butene and octene?

  • Boiling point

  • Number of hydrogen atoms per molecule

  • Relative molecular mass

  • Functional group

Choose your answer

Did this page help you?

51 mark

Ethanol is used as a solvent and fuel, it is produced by the ….1….. of ….2…. .

Which words would correctly complete the gaps 1 and 2?

  1 2
A combustion ethane
B combustion glucose
C fermentation glucose
D fermentation ethane

Choose your answer

Did this page help you?

11 mark

The diagram shows a sequence of reactions.

q1-11-2-hard-cie-igcse-chemistry

Which row correctly names the processes P, Q and R?

  P Q R
A distillation fermentation respiration
B distillation hydration combustion
C cracking fermentation respiration
D cracking hydration combustion

Choose your answer

Did this page help you?

21 mark

Hydrocarbons separated by fractional distillation of petroleum can be cracked to make useful shorter chain products.

Which substance is not a product of the cracking of propane, Mr 44?

  • C4H8

  • C2H4

  • C3H6

  • H2

Choose your answer

Did this page help you?

31 mark

Which of these statements about carboxylic acids is not correct?

  • Aqueous ethanoic acid has a pH less than 7.

  • Methyl orange turns yellow in aqueous ethanoic acid.

  • They produce carbon dioxide when reacted with a metal carbonate.

  • They contain the functional group -COOH.

Choose your answer

Did this page help you?

41 mark

The diagram shows the structure of a compound, X.

eZj_lZpx_q4-11-2-hard-cie-igcse-chemistry

Which row correctly describes the properties of X?

  colourless characteristic smell dissolves in water
A ✓ ✗ ✓
B ✓ ✓ ✗
C ✓ ✓ ✓
D ✗ ✗ ✓

Choose your answer

Did this page help you?

51 mark

The products of some reactions are shown below.

Which row correctly identifies the products of a reaction between a carboxylic acid and an alcohol?

  • Alkene and water

  • Alkane and water

  • Alcohol and water

  • Ester and water

Choose your answer

Did this page help you?

61 mark

The apparatus below was used to test gas Y

q6-1-11-2-hard-cie-igcse-chemistry

The bromine solution quickly went colourless.

What is the correct structure of gas Y?

q6-2-11-2-hard-cie-igcse-chemistry

Choose your answer

Did this page help you?

71 mark

The following reaction takes place in the presence of light.

CH4 + Cl2 + light → CH3Cl + HCl

What is the name for this reaction?

  • Combustion

  • Polymerisation

  • Thermal decomposition

  • Substitution

Choose your answer

Did this page help you?

81 mark

Which of these is an advantage of producing ethanol by fermentation of sugar compared to the catalytic addition of steam to ethene?

  • The process uses high temperatures.

  • The alcohol produced is purer.

  • The process is faster.

  • The process uses renewable raw materials.

Choose your answer

Did this page help you?

11 mark

The table below shows 4 different sources of petroleum (crude oil) and their composition.

Fraction Arabian Heavy /% Arabian Light /% Iranian Heavy /%

North Sea

/%
gasoline 18 21 21 23
kerosene 11.5 13 13 15
diesel 18 20 20 24
fuel oil 52.5 46 46 38

Which composition of petroleum would be the best for the motor vehicle industry?

  • North Sea

  • Arabian Heavy

  • Arabian Light

  • Iranian Heavy

Choose your answer

Did this page help you?

21 mark

A student carried out a cracking reaction on hydrocarbon, P, and obtained two products; Q and R.

q2-11-2-medium-cie-igcse-chemistryThe student then made the following notes:

1 Q is unsaturated.
2 R will decolourise bromine water.
3 A molecule of P has 7 carbon atoms.

Which of the statements are correct?

  • 1 & 3

  • 1 & 2

  • 2 & 3

  • 1, 2 & 3

Choose your answer

Did this page help you?

31 mark

Which of the following properties of different compounds in petroleum enable it to be separated into fractions?

  1 Chain length
  2 Chemical reactivity
  3 Solubility in water
  4 Boiling point

  • 1 & 3

  • 1 & 4

  • 2 & 3

  • 2 & 4

Choose your answer

Did this page help you?

41 mark

The diagram below shows the apparatus used to separate petroleum (crude oil) into four fractions.

q4-11-2-medium-cie-igcse-chem

Which fraction contains the smallest hydrocarbon molecules?

fraction boiling point range / °C
A up to 70
B 71 to 120
C 121 to 170
D over 171

Choose your answer

Did this page help you?

51 mark

Ethanol can be produced from substance Y.

substance Y + steam rightwards arrow with catalyst on top ethanol

What is substance Y?

  • Ethane

  • Ethene

  • Carbon dioxide

  • Hydrogen

Choose your answer

Did this page help you?