Most Difficult Multiple-Choice Questions From VCAA Chemistry Past Papers (2017-2021) - Units 3 and 4 - QUESTION AND ANSWER BOOK

Sep 20, 2026

Chemistry question-and-answer book for Kennedy College, covering VCAA Chemistry Units 3 and 4. It outlines examination structure for multiple-choice items, including marks rules and required materials, and provides section A instructions for answering in pencil. The included questions address protein denaturation, ammonia equilibrium, flashpoints, oxidation to carboxylic acids, haemoglobin binding equilibria, bomb calorimetry interpretation, catalyst effects on energy profiles, HPLC retention time, and glycaemic index determination methods.

LanguageEnglish

CategoryExam

FormatPDF

Pages5

Reading Time13 min

AccessFree to download

SECTION A – Multiple-choice questions

Instructions for Section A

Questions

Question 1 (2017)

Question 2 (2017)

Question 3 (2019)

Question 4 (2021)

Question 5 (2019)

Question 6 (2021)

Question 7 (2021)

Question 8 (2021)

Question 9 (2021)

Question 10 (2021)

STUDENT NAME Kennedy College CHEMISTRY Most Difficult Multiple-Choice Questions From VCAA Chemistry Past Papers (2017-2021) Units 3 and 4 QUESTION AND ANSWER BOOK Structure of book | Section | Number of | Number of questions | Number of | | --- | --- | --- | --- | | | questions | to be answered | marks | | A | 10 | 10 | 10
Total 10 | • Students are permitted to bring into the examination room: pens, pencils, highlighters, erasers, sharpeners, rulers and one scientific calculator. • Students are NOT permitted to bring into the examination room: blank sheets of paper and/or correction fluid/tape. Materials supplied • Question and answer book of 5 pages • Data book • Answer sheet for multiple-choice questions Instructions • Write your name in the space provided at the top of this page. • Unless indicated, the diagrams in this book are not drawn to scale. • All written responses must be in English. Students are NOT permitted to bring mobile phones and/or any other unauthorised electronic devices into the examination room. KENNEDY COLLEGE 2021 SECTION A – Multiple-choice questions Instructions for Section A Answer all questions in pencil on the answer sheet provided for multiple-choice questions. Choose the response that is correct or that best answers the question. A correct answer scores 1; an incorrect answer scores 0 Marks will not be deducted for incorrect answers. No marks will be given if more than one answer is completed for any question. Unless otherwise indicated, the diagrams in this book are not drawn to scale. Question 1 2017 Question 15 Which one of the following is a correct statement about the denaturation of a protein? A. Denaturation is characterised by the release of peptides. B. Alcohol denatures proteins by disrupting the hydrogen bonding. C. Denaturation involves disruption of all bonds in the tertiary structure. D. The primary and secondary structures are disrupted when denaturation occurs Question 2 2017 Question 18 Ammonia, 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. The equation for the reaction is shown below. N2(g) + 3H2(g) ⇌ 2NH3(g) ΔH = –92 kJ mol–1 If the pressure and volume remain constant when the temperature is increased, the forward reaction rate will A. increase and the [NH3] will increase. B. increase and the [NH3] will decrease. C. decrease and the [NH3] will decrease. D. decrease and the [NH3] will remain the same. Question 3 2019 Question 13 Which one of the following statements about flashpoints is correct? A. The flashpoint of butane is lower than 25 °C. B. As a flashpoint increases, the viscosity decreases. C. The flashpoint of a compound is higher than its boiling point. D. The flashpoint of butane is greater than the flashpoint of butan-1-ol. Question 4 2021 NHT Question 12 Which one of the following molecules can be oxidised to produce a carboxylic acid? A. propan-2-ol B. 1-chlorobutan-1-ol C. 2,2-dichloroethanol D. 2-methylpropan-2-ol Question 5 2019 Question 18 Question 6 2021 NHT Question 16 Carbon monoxide, CO, and oxygen, O2, dissociate from haemoglobin, represented by Hb, in the blood according to two reactions. Reaction 1 Reaction 2 Hb(O2)4 ⇌ Hb + 4O2 Hb(CO)4 ⇌ Hb + 4CO K1 K2 Which one of the following statements is true? A. K2 is much greater than K1. B. O2 binds more readily to Hb than CO. C. Increased levels of CO in the blood favour the forward reaction for Reaction 1. D. Breathing 100% O2 increases the amount of free Hb in a person exposed to CO. Question 7 2021 NHT Question 22 The diagram below shows the apparatus for a bomb calorimeter. The 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

FAQs

What are the key rules for answering the multiple-choice questions in Section A?

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.

Which topics are covered by the sample questions in the book?

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.

How should diagrams be treated when responding to questions?

Unless otherwise indicated, the diagrams in the book are not drawn to scale.

Sep 20, 2026

Uploaded by Anna Hans