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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 106 of 137 · choose a topic above to narrow them down

SA-AC-HA-0031 markL2 StandardCalculatorReactions

To make a nitrile from a halogenoalkane, use

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SA-AC-HA-0041 markL2 StandardCalculatorSubstitution

The SN2 mechanism

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SA-AC-HA-0051 markL2 StandardCalculatorSubstitution

Tertiary halogenoalkanes usually react by SN1 because

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SA-AC-IE-0021 markL2 StandardCalculatorTrends

First ionisation energy decreases down group 2 mainly because

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SA-AC-IE-0031 markL2 StandardCalculatorTrends

The first IE of aluminium is lower than that of magnesium because

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SA-AC-IE-0041 markL2 StandardCalculatorTrends

Across period 3, first IE generally increases because

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SA-AC-IE-0051 markL2 StandardCalculatorSuccessive IEs

Successive IEs of an element: 578, 1817, 2745, 11577 kJ/mol. The element is in group

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SA-AC-IM-0021 markL2 StandardCalculatorTypes of force

Which substance forms hydrogen bonds between its molecules?

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SA-AC-IM-0031 markL2 StandardCalculatorBoiling points

HF has a much higher boiling point than HCl because

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SA-AC-IM-0041 markL2 StandardCalculatorBoiling points

Boiling points of the noble gases increase down the group because

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SA-AC-IM-0051 markL2 StandardCalculatorBoiling points

Which has the highest boiling point?

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SA-AC-IR-0021 markL2 StandardCalculatorInfrared

An alcohol's IR spectrum shows a broad absorption at

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SA-AC-IR-0031 markL2 StandardCalculatorInfrared

Ethanol is oxidised; the product's IR spectrum shows a peak at 1730 cm⁻¹ but no broad O–H band. The product is

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SA-AC-IR-0041 markL2 StandardCalculatorMass spectra

The molecular ion peak gives

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SA-AC-IR-0051 markL2 StandardCalculatorMass spectra

A peak at

m/z

= 29 in a mass spectrum could be

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SA-AC-KI-0021 markL2 StandardCalculatorBoltzmann

When temperature increases, the Boltzmann curve

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SA-AC-KI-0031 markL2 StandardCalculatorBoltzmann

The main reason a small temperature rise greatly increases rate is that

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SA-AC-KI-0041 markL2 StandardCalculatorCatalysts

A heterogeneous catalyst is

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SA-AC-KI-0051 markL2 StandardCalculatorCatalysts

In heterogeneous catalysis, reactant molecules first

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SA-AC-KP-0012 marksL2 StandardCalculatorKp

A mixture contains 0.60 mol N₂O₄ and 0.40 mol NO₂ at a total pressure of 100 kPa. Calculate

K_p

(kPa) for

\mathrm{N_2O_4\rightleftharpoons2NO_2}

.

Salam Academy Original Practice · Proposed mark scheme