Getty Images In an experiment, 30 mL of water is to be transferred into a conical flask.Which piece of equipment would deliver the volume with the greatest accuracy? Burette Correct Incorrect Burette Beaker Correct Incorrect Beaker Test tube Correct Incorrect Test tube Measuring cylinder Correct Incorrect Measuring cylinder Which of the following is an industrial use of ammonia? As a catalyst in the Haber process Correct Incorrect As a catalyst in the Haber process As a reagent in the production of fertilisers Correct Incorrect As a reagent in the production of fertilisers As a catalyst in the manufacture of explosives Correct Incorrect As a catalyst in the manufacture of explosives As a reagent in the treatment of water Correct Incorrect As a reagent in the treatment of water What is the name of this compound? NSW Education Standards Authority Styrene Correct Incorrect Styrene Ethylene Correct Incorrect Ethylene Chloroethane Correct Incorrect Chloroethane Vinyl chloride Correct Incorrect Vinyl chloride An esterification reaction is to be performed. Which of the following substances, when added, would increase the yield of the product? Water Correct Incorrect Water Boiling chips Correct Incorrect Boiling chips More alkanol Correct Incorrect More alkanol Dilute sulfuric acid Correct Incorrect Dilute sulfuric acid What is the molecular formula of pentanoic acid? C5H9O Correct Incorrect C5H9O C5H10O Correct Incorrect C5H10O C5H10O2 Correct Incorrect C5H10O2 C5H11O2 Correct Incorrect C5H11O2 Which combination of equimolar solutions would produce the most basic mixture? Acetic acid and barium hydroxide Correct Incorrect Acetic acid and barium hydroxide Acetic acid and sodium carbonate Correct Incorrect Acetic acid and sodium carbonate Sulfuric acid and barium hydroxide Correct Incorrect Sulfuric acid and barium hydroxide Sulfuric acid and sodium carbonate Correct Incorrect Sulfuric acid and sodium carbonate A procedure was used to test water hardness. • 5.0 mL of hard water was placed in a test tube.• 0.1 mL of liquid soap was added to the test tube.• The sample was shaken for 30 seconds.• The height of bubbles was measured.What would be a suitable control to use with this procedure? Not adding any soap to the test tube Correct Incorrect Not adding any soap to the test tube Not placing any water in the test tube Correct Incorrect Not placing any water in the test tube Using a second sample of the hard water Correct Incorrect Using a second sample of the hard water Replacing the hard water with distilled water Correct Incorrect Replacing the hard water with distilled water Cellulose extracted from biomass is able to be used as a raw material in the manufactureof polymers because it: Is a condensation polymer Correct Incorrect Is a condensation polymer Is a strong flexible molecule Correct Incorrect Is a strong flexible molecule Produces carbon dioxide when burnt Correct Incorrect Produces carbon dioxide when burnt Contains a basic carbon-chain structure Correct Incorrect Contains a basic carbon-chain structure Which of the following greatly enhanced scientific understanding of the effects of trace elements? Improved filteration techniques Correct Incorrect Improved filteration techniques The development of atomic absorption spectroscopy Correct Incorrect The development of atomic absorption spectroscopy The creation of new elements in particle accelerators Correct Incorrect The creation of new elements in particle accelerators The work of Le Chatelier in describing chemical equilibrium Correct Incorrect The work of Le Chatelier in describing chemical equilibrium Which row of the table correctly matches an ion with its flame colour during a flame test? NSW Education Standards Authority A. Correct Incorrect A. B. Correct Incorrect B. C. Correct Incorrect C. D. Correct Incorrect D. Which of the following is a transuranic element that is most likely to have been producedin a nuclear reactor? Co-60 Correct Incorrect Co-60 Np-239 Correct Incorrect Np-239 U-238 Correct Incorrect U-238 Hs-265 Correct Incorrect Hs-265 Esterification can be carried out in a school laboratory using this equipment. How could the safety of the process shown be improved? NSW Education Standards Authority Place a stopper on top of the condensed Correct Incorrect Place a stopper on top of the condensed Add concentrated sulfuric acid to the flask Correct Incorrect Add concentrated sulfuric acid to the flask Change the direction of water flow through the condenser Correct Incorrect Change the direction of water flow through the condenser Replace the Bunsen burner with an electric heating mantle Correct Incorrect Replace the Bunsen burner with an electric heating mantle Excess barium nitrate solution is added to 200 mL of 0.200 mol L–1 sodium sulfate. What is the mass of the solid formed? 4.65g Correct Incorrect 4.65g 8.69g Correct Incorrect 8.69g 9.33g Correct Incorrect 9.33g 31.5g Correct Incorrect 31.5g Sodium hydrogen carbonate is often used to clean up large spills of acids and alkalis. Why is it a suitable chemical for this application? It is diprotic and is readily neutralised Correct Incorrect It is diprotic and is readily neutralised It is amphiprotic, stable and easily handled Correct Incorrect It is amphiprotic, stable and easily handled It is diprotic and easily cleaned up when neutralised Correct Incorrect It is diprotic and easily cleaned up when neutralised It is amphiprotic and only small quantities are required Correct Incorrect It is amphiprotic and only small quantities are required Which of the following would NOT have been classified as an acid by Antoine Lavoisier in 1780? Acetic acid Correct Incorrect Acetic acid Citric acid Correct Incorrect Citric acid Sulfuric acid Correct Incorrect Sulfuric acid Hydrochloric acid Correct Incorrect Hydrochloric acid What flame colour do copper ions produce when heated? Brick red Correct Incorrect Brick red Blue-green Correct Incorrect Blue-green Pale purple Correct Incorrect Pale purple Yellow-orange Correct Incorrect Yellow-orange What volume of carbon dioxide will be produced if 10.3g of glucose is fermented at 25°C and 100 kPA? 1.30L Correct Incorrect 1.30L 1.42L Correct Incorrect 1.42L 2.57L Correct Incorrect 2.57L 2.83L Correct Incorrect 2.83L In which layer of the atmosphere is ozone considered a pollutant? Mesosphere Correct Incorrect Mesosphere Stratosphere Correct Incorrect Stratosphere Thermosphere Correct Incorrect Thermosphere Troposphere Correct Incorrect Troposphere How many isomers are there of C3H6CIF? 3 Correct Incorrect 3 4 Correct Incorrect 4 5 Correct Incorrect 5 6 Correct Incorrect 6 Which of the following compounds is represented by X in the flowchart? NSW Education Standards Cellulose Correct Incorrect Cellulose Ethanol Correct Incorrect Ethanol Glucose Correct Incorrect Glucose Styrene Correct Incorrect Styrene Questions and images were taken from previous HSC Chemistry exams, available on the NSW Education Standards Authority website.