Back to speedrun
RUN REVIEW · Chemistry · Units 1 & 2

That y8 kid 🤣 - bot · guest

11 Sep 2026, 9:00 p.m.

20Serious score
01 Which response best completes this VCE-style item? Structural isomers have
A the same molecular formula but different connectivity Structural isomers differ in how atoms are connected.
B identical structural formulas This does not satisfy the stated relationship.
C the same physical properties in every case This does not satisfy the stated relationship.
D different molecular formulas only This does not satisfy the stated relationship.

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

02 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

03 During a one-minute revision round: An atom has 17 protons and 18 electrons. It is
A \(\mathrm{Cl^+}\) This does not satisfy the stated relationship.
B \(\mathrm{Ar}\) This does not satisfy the stated relationship.
C \(\mathrm{Cl^-}\) One extra electron gives chlorine a −1 charge.
D \(\mathrm{Cl}\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Atomic structure · answered at 100 ms

04 An unknown absorbance lies beyond all standards on a calibration graph. The best action is to
A dilute it into the calibrated range and account for dilution Reliable interpolation requires the unknown to lie within the calibrated range.
B extrapolate indefinitely This does not satisfy the stated relationship.
C change the wavelength after measuring This does not satisfy the stated relationship.
D report zero concentration This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Calibration curves · answered at 100 ms

05 Which response best completes this VCE-style item? The strongest intermolecular attraction between water molecules is
A covalent network bonding This does not satisfy the stated relationship.
B metallic bonding This does not satisfy the stated relationship.
C hydrogen bonding O–H bonds allow hydrogen bonding between molecules.
D ionic bonding This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Intermolecular forces · answered at 100 ms

06 A student is checking a worked solution. The most suitable apparatus for delivering one accurately known titration volume is a
A test tube This does not satisfy the stated relationship.
B beaker This does not satisfy the stated relationship.
C burette A burette measures accurately the variable volume delivered.
D measuring cylinder This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Volumetric analysis · answered at 100 ms

07 During a one-minute revision round: 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 \(\mathrm{CH_2}\) The simplest whole-number ratio is 1:2.
D \(\mathrm{C_2H_4}\) only This does not satisfy the stated relationship.

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

08 During a one-minute revision round: A strong acid differs from a weak acid because the strong acid
A ionises to a greater extent in water Strength describes extent of ionisation, not concentration.
B must be more concentrated This does not satisfy the stated relationship.
C contains more hydrogen atoms This does not satisfy the stated relationship.
D has a larger molar mass This does not satisfy the stated relationship.

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

09 A student is checking a worked solution. An unknown absorbance lies beyond all standards on a calibration graph. The best action is to
A extrapolate indefinitely This does not satisfy the stated relationship.
B dilute it into the calibrated range and account for dilution Reliable interpolation requires the unknown to lie within the calibrated range.
C report zero concentration This does not satisfy the stated relationship.
D change the wavelength after measuring This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Calibration curves · answered at 100 ms

10 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

11 Which response best completes this VCE-style item? A highly cross-linked polymer is usually
A thermosetting Cross-links prevent chains sliding when heated.
B an ionic solution This does not satisfy the stated relationship.
C easily remelted as a thermoplastic This does not satisfy the stated relationship.
D a monatomic gas This does not satisfy the stated relationship.

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

12 During a one-minute revision round: The most suitable apparatus for delivering one accurately known titration volume is a
A test tube This does not satisfy the stated relationship.
B beaker This does not satisfy the stated relationship.
C burette A burette measures accurately the variable volume delivered.
D measuring cylinder This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Volumetric analysis · answered at 100 ms

13 The most suitable apparatus for delivering one accurately known titration volume is a
A test tube This does not satisfy the stated relationship.
B measuring cylinder This does not satisfy the stated relationship.
C burette A burette measures accurately the variable volume delivered.
D beaker This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Volumetric analysis · answered at 100 ms

14 Two isotopes of the same element must have the same number of
A nucleons This does not satisfy the stated relationship.
B electrons in every ion This does not satisfy the stated relationship.
C protons Atomic number, hence proton number, defines the element.
D neutrons This does not satisfy the stated relationship.

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

15 A student is checking a worked solution. The correct formula for aluminium sulfate is
A \(\mathrm{Al(SO_4)_2}\) This does not satisfy the stated relationship.
B \(\mathrm{Al_3SO_4}\) This does not satisfy the stated relationship.
C \(\mathrm{AlSO_4}\) This does not satisfy the stated relationship.
D \(\mathrm{Al_2(SO_4)_3}\) Two Al³⁺ balance three sulfate ions.

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

16 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

17 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

18 During a one-minute revision round: Which functional group identifies a carboxylic acid?
A \(\mathrm{-Cl}\) This does not satisfy the stated relationship.
B \(\mathrm{-COOH}\) Carboxylic acids contain the carboxyl group.
C \(\mathrm{-OH}\) only This does not satisfy the stated relationship.
D \(\mathrm{C=C}\) This does not satisfy the stated relationship.

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

19 Which response best completes this VCE-style item? Two isotopes of the same element must have the same number of
A nucleons This does not satisfy the stated relationship.
B neutrons This does not satisfy the stated relationship.
C electrons in every ion This does not satisfy the stated relationship.
D protons Atomic number, hence proton number, defines the element.

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

20 Which response best completes this VCE-style item? The most suitable apparatus for delivering one accurately known titration volume is a
A measuring cylinder This does not satisfy the stated relationship.
B burette A burette measures accurately the variable volume delivered.
C test tube This does not satisfy the stated relationship.
D beaker This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Volumetric analysis · answered at 100 ms

Run it again