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RUN REVIEW · Chemistry · Units 1 & 2

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11 Sep 2026, 9:00 p.m.

20Serious score
01 During a one-minute revision round: The pH of \(1.0\times10^{-3}\ \mathrm{M\ HCl}\) is
A 11.0 This does not satisfy the stated relationship.
B 1.0 This does not satisfy the stated relationship.
C 7.0 This does not satisfy the stated relationship.
D 3.0 For strong HCl, \([H^+]=10^{-3}\), so pH = 3.

Written for icaijy.com · U2 · pH · answered at 100 ms

02 A student is checking a worked solution. In a chromatogram, a pure substance under fixed conditions should ideally produce
A a spot beyond the solvent front This does not satisfy the stated relationship.
B one spot A single component ideally produces one spot.
C four spots This does not satisfy the stated relationship.
D no solvent front This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Chromatography · answered at 100 ms

03 The pH of \(1.0\times10^{-3}\ \mathrm{M\ HCl}\) is
A 7.0 This does not satisfy the stated relationship.
B 1.0 This does not satisfy the stated relationship.
C 11.0 This does not satisfy the stated relationship.
D 3.0 For strong HCl, \([H^+]=10^{-3}\), so pH = 3.

Written for icaijy.com · U2 · pH · answered at 100 ms

04 During a one-minute revision round: Two isotopes of the same element must have the same number of
A nucleons This does not satisfy the stated relationship.
B protons Atomic number, hence proton number, defines the element.
C electrons in every ion This does not satisfy the stated relationship.
D neutrons This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Isotopes · answered at 100 ms

05 A student is checking a worked solution. The molecular shape of ammonia, \(\mathrm{NH_3}\), is
A bent This does not satisfy the stated relationship.
B tetrahedral This does not satisfy the stated relationship.
C pyramidal Three bonding pairs and one lone pair give a pyramidal shape.
D linear This does not satisfy the stated relationship.

Written for icaijy.com · U1 · VSEPR · answered at 100 ms

06 The IUPAC name of \(\mathrm{CH_3CH_2OH}\) is
A ethanal This does not satisfy the stated relationship.
B methanol This does not satisfy the stated relationship.
C ethanol It is a two-carbon alcohol.
D ethene This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Organic nomenclature · answered at 100 ms

07 During a one-minute revision round: Solid sodium chloride does not conduct electricity because
A chloride ions lose their charge This does not satisfy the stated relationship.
B it contains no charged particles This does not satisfy the stated relationship.
C sodium is a non-metal This does not satisfy the stated relationship.
D its ions cannot move through the lattice The charged ions are fixed in the solid lattice.

Written for icaijy.com · U1 · Ionic substances · answered at 100 ms

08 A compound has 1 mol C atoms for every 2 mol H atoms. Its empirical formula is
A \(\mathrm{CH}\) This does not satisfy the stated relationship.
B \(\mathrm{C_2H}\) This does not satisfy the stated relationship.
C \(\mathrm{C_2H_4}\) only This does not satisfy the stated relationship.
D \(\mathrm{CH_2}\) The simplest whole-number ratio is 1:2.

Written for icaijy.com · U1 · Empirical formula · answered at 100 ms

09 A student is checking a worked solution. How many moles are in 18.0 g of water?
A 324 mol This does not satisfy the stated relationship.
B 0.500 mol This does not satisfy the stated relationship.
C 18.0 mol This does not satisfy the stated relationship.
D 1.00 mol \(n=m/M=18.0/18.0=1.00\).

Written for icaijy.com · U1 · Mole concept · answered at 100 ms

10 During a one-minute revision round: At SLC, the molar volume used in the VCAA data book is
A \(22.4\ \mathrm{L\ mol^{-1}}\) This does not satisfy the stated relationship.
B \(8.31\ \mathrm{L\ mol^{-1}}\) This does not satisfy the stated relationship.
C \(100\ \mathrm{L\ mol^{-1}}\) This does not satisfy the stated relationship.
D \(24.8\ \mathrm{L\ mol^{-1}}\) At 25 °C and 100 kPa, the data-book value is 24.8 L mol⁻¹.

Written for icaijy.com · U2 · Gases · answered at 100 ms

11 Which response best completes this VCE-style item? A component travels 3.0 cm while the solvent front travels 5.0 cm. Its \(R_f\) is
A 8.0 This does not satisfy the stated relationship.
B 0.60 \(R_f=3.0/5.0=0.60\).
C 1.67 This does not satisfy the stated relationship.
D 2.0 This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Chromatography · answered at 100 ms

12 A student is checking a worked solution. Ice is less dense than liquid water because its hydrogen-bonded structure is
A ionic This does not satisfy the stated relationship.
B more open The solid lattice holds molecules further apart.
C free of intermolecular forces This does not satisfy the stated relationship.
D more tightly packed This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Water · answered at 100 ms

13 In the Brønsted–Lowry model, a base
A accepts an electron only This does not satisfy the stated relationship.
B must contain hydroxide This does not satisfy the stated relationship.
C accepts a proton A Brønsted–Lowry base is a proton acceptor.
D donates a proton This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Acids and bases · answered at 100 ms

14 During a one-minute revision round: Structural isomers have
A the same physical properties in every case This does not satisfy the stated relationship.
B identical structural formulas This does not satisfy the stated relationship.
C the same molecular formula but different connectivity Structural isomers differ in how atoms are connected.
D different molecular formulas only This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Isomers · answered at 100 ms

15 A student is checking a worked solution. Structural isomers have
A the same molecular formula but different connectivity Structural isomers differ in how atoms are connected.
B different molecular formulas only This does not satisfy the stated relationship.
C identical structural formulas This does not satisfy the stated relationship.
D the same physical properties in every case This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Isomers · answered at 100 ms

16 The molecular shape of ammonia, \(\mathrm{NH_3}\), is
A linear This does not satisfy the stated relationship.
B tetrahedral This does not satisfy the stated relationship.
C pyramidal Three bonding pairs and one lone pair give a pyramidal shape.
D bent This does not satisfy the stated relationship.

Written for icaijy.com · U1 · VSEPR · answered at 100 ms

17 Carbon dioxide has polar bonds but is non-polar because
A it forms ionic bonds This does not satisfy the stated relationship.
B it contains no valence electrons This does not satisfy the stated relationship.
C C and O have equal electronegativity This does not satisfy the stated relationship.
D its linear bond dipoles cancel The molecule is linear and symmetric.

Written for icaijy.com · U1 · Polarity · answered at 100 ms

18 A student is checking a worked solution. Reprocessing used aluminium into new aluminium products is closest to
A complete biodegradation This does not satisfy the stated relationship.
B a linear economy This does not satisfy the stated relationship.
C a circular economy Material is recovered and returned to productive use.
D carbon capture This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Sustainability · answered at 100 ms

19 Which response best completes this VCE-style item? Carbon dioxide has polar bonds but is non-polar because
A C and O have equal electronegativity This does not satisfy the stated relationship.
B its linear bond dipoles cancel The molecule is linear and symmetric.
C it contains no valence electrons This does not satisfy the stated relationship.
D it forms ionic bonds This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Polarity · answered at 100 ms

20 Which response best completes this VCE-style item? Solid sodium chloride does not conduct electricity because
A sodium is a non-metal This does not satisfy the stated relationship.
B its ions cannot move through the lattice The charged ions are fixed in the solid lattice.
C it contains no charged particles This does not satisfy the stated relationship.
D chloride ions lose their charge This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Ionic substances · answered at 100 ms

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