VCE Chemistry Past Exam Questions
Browse VCE Chemistry exam questions from 2015–2026, including NHT and VCE papers. Filter by topic, year and paper; open the original source.
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Section B, Question 1(e)Question part (e)
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e. One SAF manufacturing process can use plant triglycerides to make fatty acid methyl esters, which are then used as biodiesel. The reaction pathway is outlined below. H H O O C C
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i. In box R, draw the structural formula of the other reactant. Include the correct stoichiometric ratio. 1 mark
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ii. In box P, identify all products. 2 marks
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iii. State why this reaction can be described as a transesterification reaction. 1 mark
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Question 2 (13 marks) A company produces pellets of sodium hydroxide, NaOH, using waste from a nearby desalination plant. The waste would otherwise be released into the ocean. The
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a. Identify one way in which the production of the pellets aligns with the principles of a circular economy. 1 mark A student, Saleem, tested the claim of 90.0% purity of the pelle
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b. Using the results on page 20, calculate the electrical calibration factor (CF). 2 marks To conduct his experiment, Saleem used the following procedure: • Weigh out 2.40 g of the
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c. Calculate the amount of energy released by the pellets in this experiment, in kJ g−1 . 3 marks
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d. The reaction occurring in the calorimeter is provided below. HCl(aq) + NaOH(aq) → NaCl(aq) + H 2 O(l) ∆H = −57.3 kJ mol−1
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i. Convert the theoretical amount of energy released in the reaction above from kJ mol−1 to kJ g−1 for NaOH. 1 mark
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ii. The percentage (%) purity of the NaOH pellets can be estimated from the amount of energy released. Evaluate the company’s % purity claim for the pellets using the formula below
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e. Saleem repeated the experiment a second time and calculated the % purity of the pellets to be 80.1%. He reflected on his method. State two reasons related to his experimental pr
Search excerpt only. Open the original question for exact equations and diagrams.Source: 2026 VCE (NHT) Chemistry examination (PDF, 2.83 MB)How to use ClassConnect past exam questions
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