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Choose the response that is correct or that best answers the question.  \nA correct answer scores 1; an incorrect answer scores 0 Marks will not be deducted for incorrect answers.  \nNo marks will be given if more than one answer is completed for any question.  \nUnless otherwise indicated, the diagrams in this book are not drawn to scale.  \nQuestion 1 2017 Question 15  \nWhich one of the following is a correct statement about the denaturation of a protein?  \nA. Denaturation is characterised by the release of peptides.  \nB. Alcohol denatures proteins by disrupting the hydrogen bonding.  \nC. Denaturation involves disruption of all bonds in the tertiary structure.  \nD. The primary and secondary structures are disrupted when denaturation occurs  \nQuestion 2 2017 Question 18  \nAmmonia, NH3, can be produced by the reaction of hydrogen, H2, and nitrogen, N2 . When this reaction takes place in a sealed container of fixed volume, an equilibrium system is established.  \nThe equation for the reaction is shown below.  \nN2(g) + 3H2(g) ⇌ 2NH3(g) ΔH = –92 kJ mol–1  \nIf the pressure and volume remain constant when the temperature is increased, the forward reaction rate will A. increase and the [NH3] will increase.  \nB. increase and the [NH3] will decrease.  \nC. decrease and the [NH3] will decrease.  \nD. decrease and the [NH3] will remain the same.  \nQuestion 3 2019 Question 13  \nWhich one of the following statements about flashpoints is correct?  \nA. The flashpoint of butane is lower than 25 °C.  \nB. As a flashpoint increases, the viscosity decreases.  \nC. The flashpoint of a compound is higher than its boiling point.  \nD. The flashpoint of butane is greater than the flashpoint of butan-1-ol.  \nQuestion 4 2021 NHT Question 12  \nWhich one of the following molecules can be oxidised to produce a carboxylic acid?  \nA. propan-2-ol  \nB. 1-chlorobutan-1-ol  \nC. 2,2-dichloroethanol  \nD. 2-methylpropan-2-ol  \nQuestion 5 2019 Question 18  \nQuestion 6 2021 NHT Question 16  \nCarbon monoxide, CO, and oxygen, O2, dissociate from haemoglobin, represented by Hb, in the blood according to two reactions.  \nReaction 1  \nReaction 2  \nHb(O2)4 ⇌ Hb + 4O2  \nHb(CO)4 ⇌ Hb + 4CO  \nK1  \nK2  \nWhich one of the following statements is true?  \nA. K2 is much greater than K1.  \nB. O2 binds more readily to Hb than CO.  \nC. Increased levels of CO in the blood favour the forward reaction for Reaction 1.  \nD. Breathing 100% O2 increases the amount of free Hb in a person exposed to CO.  \nQuestion 7 2021 NHT Question 22  \nThe diagram below shows the apparatus for a bomb calorimeter.  \nThe bomb calorimeter containing 500 g of water was chemically calibrated by combusting 0.720 g of ethanol with an excess of oxygen. The increase in temperature was found","cbCaiq5apW1g4m3o","https://ap.wps.com/l/cbCaiq5apW1g4m3o","pdf",394613,"English","# SECTION A – Multiple-choice questions\n## Instructions for Section A\n## Questions\n### Question 1 (2017)\n### Question 2 (2017)\n### Question 3 (2019)\n### Question 4 (2021)\n### Question 5 (2019)\n### Question 6 (2021)\n### Question 7 (2021)\n### Question 8 (2021)\n### Question 9 (2021)\n### Question 10 (2021)","[{\"question\":\"What are the key rules for answering the multiple-choice questions in Section A?\",\"answer\":\"Answer all questions in pencil on the provided answer sheet. Choose the response that is correct or best answers the question; correct answers score 1 and incorrect answers score 0, with no deductions for incorrect choices. No marks are given if more than one answer is completed for any question.\"},{\"question\":\"Which topics are covered by the sample questions in the book?\",\"answer\":\"The questions cover protein denaturation, ammonia equilibrium in a sealed container, flashpoints, oxidation pathways to carboxylic acids, haemoglobin dissociation/binding equilibria, bomb calorimeter calibration interpretation, catalyst effects on activation energies, HPLC retention time with different polarity, and factors affecting glycaemic index.\"},{\"question\":\"How should diagrams be treated when responding to questions?\",\"answer\":\"Unless otherwise indicated, the diagrams in the book are not drawn to scale.\"}]","Most Difficult Multiple-Choice Questions From VCAA Chemistry Past Papers (2017-2021) - Units 3 and 4 - QUESTION AND ANSWER BOOK | PDF",1789908552,13]