That y8 kid 🤣 - bot · guest · Chemistry

01 A student is checking a worked solution. Down a group, first ionisation energy generally

A increases This does not satisfy the stated relationship.

B decreases Outer electrons are further from the nucleus and more shielded.

C becomes zero This does not satisfy the stated relationship.

D is exactly constant This does not satisfy the stated relationship.

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

02 Which response best completes this VCE-style item? In a chromatogram, a pure substance under fixed conditions should ideally produce

A four spots This does not satisfy the stated relationship.

B no solvent front This does not satisfy the stated relationship.

C one spot A single component ideally produces one spot.

D a spot beyond the solvent front This does not satisfy the stated relationship.

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

03 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

04 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

05 Reprocessing used aluminium into new aluminium products is closest to

A a circular economy Material is recovered and returned to productive use.

B carbon capture This does not satisfy the stated relationship.

C complete biodegradation This does not satisfy the stated relationship.

D a linear economy This does not satisfy the stated relationship.

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

06 During a one-minute revision round: A component travels 3.0 cm while the solvent front travels 5.0 cm. Its \(R_f\) is

A 0.60 \(R_f=3.0/5.0=0.60\).

B 8.0 This does not satisfy the stated relationship.

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

07 Which equation conserves atoms and charge?

A \(\mathrm{Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)}\) The net ionic equation is balanced for atoms and charge.

B \(\mathrm{Ag+Cl^-\rightarrow AgCl^-}\) This does not satisfy the stated relationship.

C \(\mathrm{Ag^++Cl^-\rightarrow Ag+Cl}\) This does not satisfy the stated relationship.

D \(\mathrm{Ag^++2Cl^-\rightarrow AgCl}\) This does not satisfy the stated relationship.

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

08 Which response best completes this VCE-style item? Ice is less dense than liquid water because its hydrogen-bonded structure is

A more open The solid lattice holds molecules further apart.

B more tightly packed This does not satisfy the stated relationship.

C ionic This does not satisfy the stated relationship.

D free of intermolecular forces This does not satisfy the stated relationship.

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

09 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

10 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

11 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

12 Which response best completes this VCE-style item? In the Brønsted–Lowry model, a base

A accepts a proton A Brønsted–Lowry base is a proton acceptor.

B accepts an electron only This does not satisfy the stated relationship.

C must contain hydroxide This does not satisfy the stated relationship.

D donates a proton This does not satisfy the stated relationship.

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

13 During a one-minute revision round: The correct formula for aluminium sulfate is

A \(\mathrm{Al_3SO_4}\) This does not satisfy the stated relationship.

B \(\mathrm{Al_2(SO_4)_3}\) Two Al³⁺ balance three sulfate ions.

C \(\mathrm{Al(SO_4)_2}\) This does not satisfy the stated relationship.

D \(\mathrm{AlSO_4}\) This does not satisfy the stated relationship.

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

14 Which response best completes this VCE-style item? Reprocessing used aluminium into new aluminium products is closest to

A complete biodegradation This does not satisfy the stated relationship.

B carbon capture This does not satisfy the stated relationship.

C a linear economy This does not satisfy the stated relationship.

D a circular economy Material is recovered and returned to productive use.

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

15 Which response best completes this VCE-style item? Down a group, first ionisation energy generally

A becomes zero This does not satisfy the stated relationship.

B is exactly constant This does not satisfy the stated relationship.

C increases This does not satisfy the stated relationship.

D decreases Outer electrons are further from the nucleus and more shielded.

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

16 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

17 A student is checking a worked solution. Which functional group identifies a carboxylic acid?

A \(\mathrm{-Cl}\) This does not satisfy the stated relationship.

B \(\mathrm{-OH}\) only This does not satisfy the stated relationship.

C \(\mathrm{-COOH}\) Carboxylic acids contain the carboxyl group.

D \(\mathrm{C=C}\) This does not satisfy the stated relationship.

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

18 A student is checking a worked solution. A highly cross-linked polymer is usually

A an ionic solution This does not satisfy the stated relationship.

B easily remelted as a thermoplastic This does not satisfy the stated relationship.

C thermosetting Cross-links prevent chains sliding when heated.

D a monatomic gas This does not satisfy the stated relationship.

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

19 During a one-minute revision round: Down a group, first ionisation energy generally

A increases This does not satisfy the stated relationship.

B is exactly constant This does not satisfy the stated relationship.

C decreases Outer electrons are further from the nucleus and more shielded.

D becomes zero This does not satisfy the stated relationship.

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

20 During a one-minute revision round: Which equation conserves atoms and charge?

A \(\mathrm{Ag^++2Cl^-\rightarrow AgCl}\) This does not satisfy the stated relationship.

B \(\mathrm{Ag+Cl^-\rightarrow AgCl^-}\) This does not satisfy the stated relationship.

C \(\mathrm{Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)}\) The net ionic equation is balanced for atoms and charge.

D \(\mathrm{Ag^++Cl^-\rightarrow Ag+Cl}\) This does not satisfy the stated relationship.

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