BlogChemistryQCAA Multiple Choice Practice Questions for Unit 3 & 4 Chemistry External Assessment
QCAA Multiple Choice Practice Questions for Unit 3 & 4 Chemistry External Assessment
Finding it difficult to come across multiple choice practice questions for the QCAA Chemistry External Assessment (EA)? Struggle no more, because we’ve got a bank of 25 questions to help you prep for your final Chemistry exam!
Once you’ve had a go at all 25 Chemistry EA multiple choice practice questions, you can go ahead and download the solutions to see how you’ve gone.
What are you waiting for? Let’s get to studying!
Chemistry EA Multiple Choice Practice Questions
Question 1
A tertiary carbon atom is
(a) bound to one other carbon
(b) bound to two other carbons
(c) bound to three other carbons
(d) bound to no other carbons
Question 2
Use IUPAC conventions to name the following structure.
Deduce what type of reaction the example below demonstrates.
Image sourced from Oxford Chemistry for Queensland Units 3 & 4
(a) substitution
(b) reduction
(c) esterification
(d) elimination
Question 4
Identify the reductant in the following redox reaction.
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
(a) CuSO4(aq)
(b) Cu(s)
(c) Zn(s)
(d) ZnSO4(aq)
Question 5
Deduce the oxidation state of chlorine in HClO3.
(a) +5
(b) +4
(c) -5
(d) -4
Question 6
According to the reactivity series in the Formula and data book, determine the correct order for the following metals from most reactive to least reactive.
(a) Ni, Li, Fe
(b) Bi, Cu, Ca
(c) Al, Mn, Co
(d) Au, Ag, Ni
Question 7
Determine which of the following is an isomer of the structure shown below.
Image sourced from Oxford Chemistry for Queensland Units 3 & 4
(a) propane
(b) 2-methylpropane
(c) butane
(d) 2-methylbutane
Question 8
Predict the effect that increasing volume at time = 18mins will have on the reaction below.
(a) The system will partially oppose the change by moving to the product side to decrease the reactant concentration, resulting in a net forward reaction
(b) The system will partially oppose the change by moving to the reactant side to decrease the reactant concentration, resulting in a net forward reaction
(c) The system will partially oppose the change by moving to the product side to decrease the reactant concentration, resulting in a net reverse reaction
(d) The system will partially oppose the change by moving to the reactant side to decrease the product concentration, resulting in a net reverse reaction
Question 9
Determine the E° value of a Mg2+/Mg and Cu2+/Cu galvanic cell.
(a) 2.71V
(b) 2.22V
(c) 2.4V
(d) 2.7V
Question 10
Predict the effect that adding a catalyst at time = 5 mins would have had on the reaction below.
(a) The system will partially oppose the change by moving to the product side to decrease the reactant concentration, resulting in a net forward reaction
(b) No effect on equilibrium
(c) The system will partially oppose the change by moving to the product side to decrease the reactant concentration, resulting in a net reverse reaction
(d) Both the forward and reverse reactions will speed up equally
Question 11
The graph below shows the titration between a strong acid and a strong base. What was the initial concentration of H+ ions in the acid?
(c) converts chemical energy into electrical energy
(d) anode is positive and cathode is negative
Question 15
Deduce which of the following is a diprotic acid.
(a) H2SO4
(b) HNO3
(c) CH3COOH
(d) HCl
Question 16
Determine the correct statement regarding equivalence point and end point.
(a) equivalence point occurs after the end point
(b) a pH indicator changes colour at the equivalence point
(c) the number of moles of titrant and analyte are equal at the equivalence point
(d) a pH indicator changes colour at the half- equivalence point
Question 17
At equilibrium, a 1.00 L vessel contains 0.04 mol of H2, 0.06 mol of I2, and 0.35 mol of HI. The system is represented by the equation below. Determine, to two decimal places, the equilibrium constant (Kc) for this reaction.
H2(g) + I2(g) ⇌ 2HI(g)
(a) Kc = 50.04
(b) Kc = 40.05
(c) Kc = 40.04
(d) Kc = 51.04
Question 18
For the graph below, identify how many times the system equilibrium has been disturbed.
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