argiewalls · Chemistry

01 A student is checking a worked solution. At dynamic equilibrium in a closed system

A all concentrations are equal This does not satisfy the stated relationship.

B reactions have stopped This does not satisfy the stated relationship.

C all reactants are consumed This does not satisfy the stated relationship.

D forward and reverse reaction rates are equal Equal rates keep macroscopic concentrations constant.

Written for icaijy.com · U3 · Equilibrium · answered at 6378 ms

02 During a one-minute revision round: During recharge, a secondary cell operates as

A a calorimeter This does not satisfy the stated relationship.

B an electrolytic cell External electrical energy drives the reverse reaction.

C a fuel cell This does not satisfy the stated relationship.

D a spontaneous galvanic cell This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Secondary cells · answered at 9212 ms

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

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

B increases This does not satisfy the stated relationship.

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 11565 ms

04 During a one-minute revision round: Oxidation of a primary alcohol can ultimately produce a

A tertiary amine This does not satisfy the stated relationship.

B carboxylic acid A primary alcohol can oxidise via an aldehyde to a carboxylic acid.

C haloalkane only This does not satisfy the stated relationship.

D triglyceride directly This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic pathways · answered at 15570 ms

05 The pH of \(1.0\times10^{-3}\ \mathrm{M\ HCl}\) is

A 1.0 This does not satisfy the stated relationship.

B 7.0 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 17857 ms

06 The IUPAC name of \(\mathrm{CH_3CH_2OH}\) is

A ethanol It is a two-carbon alcohol.

B ethanal This does not satisfy the stated relationship.

C methanol This does not satisfy the stated relationship.

D ethene This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Organic nomenclature · answered at 23556 ms

07 A student is checking a worked solution. In a galvanic cell, oxidation occurs at the

A cathode This does not satisfy the stated relationship.

B anode Oxidation always occurs at the anode.

C salt bridge This does not satisfy the stated relationship.

D voltmeter This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Energy · answered at 27954 ms

08 A student is checking a worked solution. The most suitable apparatus for delivering one accurately known titration volume is a

A beaker This does not satisfy the stated relationship.

B test tube 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 32372 ms

09 Which response best completes this VCE-style item? The correct formula for aluminium sulfate is

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

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

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

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

Written for icaijy.com · U1 · Formulae · answered at 37053 ms

10 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 \(\mathrm{CH_2}\) The simplest whole-number ratio is 1:2.

C \(\mathrm{C_2H_4}\) only This does not satisfy the stated relationship.

D \(\mathrm{C_2H}\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Empirical formula · answered at 39776 ms

11 During a one-minute revision round: At dynamic equilibrium in a closed system

A reactions have stopped This does not satisfy the stated relationship.

B forward and reverse reaction rates are equal Equal rates keep macroscopic concentrations constant.

C all concentrations are equal This does not satisfy the stated relationship.

D all reactants are consumed This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Equilibrium · answered at 45297 ms

12 During a one-minute revision round: The pH of \(1.0\times10^{-3}\ \mathrm{M\ HCl}\) is

A 1.0 This does not satisfy the stated relationship.

B 3.0 For strong HCl, \([H^+]=10^{-3}\), so pH = 3.

C 7.0 This does not satisfy the stated relationship.

D 11.0 This does not satisfy the stated relationship.

Written for icaijy.com · U2 · pH · answered at 46575 ms

13 The number of signals in a low-resolution \(^{13}\mathrm C\)-NMR spectrum indicates the number of

A distinct carbon environments Chemically equivalent carbon atoms share a signal.

B hydrogen atoms This does not satisfy the stated relationship.

C double bonds only This does not satisfy the stated relationship.

D carbon atoms without regard to symmetry This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Carbon NMR · answered at 50763 ms

14 In the Brønsted–Lowry model, a base

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

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

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

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

Written for icaijy.com · U2 · Acids and bases · answered at 54201 ms

15 Which functional group identifies a carboxylic acid?

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

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

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

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

Written for icaijy.com · U1 · Organic families · answered at 58457 ms

16 In a chromatogram, a pure substance under fixed conditions should ideally produce

A no 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 a spot beyond the solvent front This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Chromatography · answered at 60000 ms