Practise

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Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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2730 questions · page 104 of 137 · choose a topic above to narrow them down

SA-AC-CB-0051 markL2 StandardCalculatorNucleophilic addition

The product of propanone and HCN is

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SA-AC-CO-0021 markL2 StandardCalculatorPolyamides

Nylon-6,6 is formed from hexanedioic acid and

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SA-AC-CO-0031 markL2 StandardCalculatorPolyesters

The small molecule lost when a diol reacts with a diacyl chloride is

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SA-AC-CO-0041 markL2 StandardCalculatorPolyamides

Kevlar is very strong because

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SA-AC-CO-0052 marksL2 StandardCalculatorPolyamides

Calculate

M_r

of the nylon-6,6 repeat unit,

\mathrm{C_{12}H_{22}N_2O_2}

. (C 12, H 1, N 14, O 16)

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SA-AC-CR-0021 markL2 StandardCalculatorPrinciples

In GC, the mobile phase is

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SA-AC-CR-0031 markL2 StandardCalculatorTLC

Amino acid spots on a TLC plate are located using

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SA-AC-CR-0041 markL2 StandardCalculatorGC

In GC, the relative amount of each component is found from

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SA-AC-CR-0052 marksL2 StandardCalculatorGC

GC peak areas: A 30, B 90, C 80 units. Calculate the % of B (assume equal detector response).

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SA-AC-CX-0021 markL2 StandardCalculatorLigands and shapes

What is the oxidation state of iron in

\mathrm{[Fe(CN)_6]^{3-}}

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SA-AC-CX-0031 markL2 StandardCalculatorLigands and shapes

The shape of

\mathrm{[CuCl_4]^{2-}}

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SA-AC-CX-0041 markL2 StandardCalculatorLigands and shapes

The coordination number of

\mathrm{[Fe(C_2O_4)_3]^{3-}}

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SA-AC-CX-0051 markL2 StandardCalculatorColour

Transition metal complexes are coloured because

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SA-AC-EN-0021 markL2 StandardCalculatorDefinitions

Which equation represents

\Delta_fH^\ominus

of water?

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SA-AC-EN-0033 marksL2 StandardCalculatorCalorimetry

Burning

0.0100

mol of a fuel heats

200

g of water by

28.5\,^\circ

C. Calculate

\Delta_cH

in kJ mol⁻¹. (

c=4.18

)

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SA-AC-EN-0042 marksL2 StandardCalculatorHess's law

Calculate

\Delta_rH

for

\mathrm{C_2H_4(g)+H_2(g)\rightarrow C_2H_6(g)}

\Delta_fH

: C₂H₄ +52, C₂H₆ −84 kJ mol⁻¹.

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SA-AC-EP-0012 marksL2 StandardCalculatorCell EMF

Calculate E⦵cell for a cell made from Ag⁺/Ag (+0.80 V) and Cu²⁺/Cu (+0.34 V).

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SA-AC-EP-0031 markL2 StandardCalculatorCell EMF

Which is the strongest oxidising agent? Cl₂/Cl⁻ +1.36; Br₂/Br⁻ +1.09; I₂/I⁻ +0.54; Fe³⁺/Fe²⁺ +0.77 V.

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SA-AC-EP-0041 markL2 StandardCalculatorCell EMF

Using the values above, which reaction is feasible?

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SA-AC-EP-0051 markL2 StandardCalculatorMeasuring E⦵

The salt bridge

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