Practice Exam 7
VCE Chemistry | Organic Chemistry, Polymers, Fuels Energy
✎ Complete ALL questions on paper before opening the Model Answers lesson. No notes. Aim for 1 minute per mark.
SHORT ANSWER
Question 1 (4 marks)
Draw and name the structural isomers of C₄H₁₀ (butane).
✎ Write your answer on paper
Question 2 (4 marks)
Write the equation for the combustion of octane (C₈H₁₈) and calculate the mass of CO₂ produced when 114 g of octane is burned completely. (M(C₈H₁₈)=114, M(CO₂)=44)
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Question 3 (4 marks)
Describe the difference between addition and condensation polymerisation with one example of each.
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Question 4 (4 marks)
Explain what is meant by the ‘greenhouse effect’ and describe how increased CO₂ emissions contribute to climate change.
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Question 5 (4 marks)
Name the products formed when ethanol is reacted with (i) sodium metal (ii) ethanoic acid with a catalyst (iii) acidified dichromate (oxidation).
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Question 6 (4 marks)
What is the heat released when 5.00 g of methane (M=16, heat of combustion = −890 kJ/mol) is burned?
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Question 7 (4 marks)
Explain why branched-chain alkanes have lower boiling points than straight-chain isomers of the same molecular formula.
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Question 8 (4 marks)
Write the structural formula and name of the ester formed between propan-1-ol and methanoic acid. Name the reaction type and identify the catalyst.
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EXTENDED RESPONSE
Extended Response 1: Hydrocarbons Combustion
Question 9 (4 marks)
Extended Response 1: Hydrocarbons Combustion (a)
Compare the properties and uses of alkanes and alkenes. Include structural features, reactivity and one industrial use of each.
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Extended Response 1: Hydrocarbons Combustion
Question 10 (3 marks)
Extended Response 1: Hydrocarbons Combustion (b)
Describe the mechanism of the reaction between bromine water and ethene. What observation confirms the reaction has occurred?
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Extended Response 1: Hydrocarbons Combustion
Question 11 (2 marks)
Extended Response 1: Hydrocarbons Combustion (c)
Explain the difference between the energy density and specific energy of a fuel, and state which is more relevant when comparing fuels for aircraft.
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Extended Response 2: Polymers
Question 12 (4 marks)
Extended Response 2: Polymers (a)
Draw a section of polyethylene terephthalate (PET), showing two repeat units. Identify the monomers from which it is made and the type of polymerisation.
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Extended Response 2: Polymers
Question 13 (3 marks)
Extended Response 2: Polymers (b)
Discuss one environmental problem associated with synthetic polymers and one strategy to address it.
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✓ Finished? Open the next lesson – Model Answers – to mark your work.
