Practise

Question bank

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

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12 questions

SA-AC-KI-0011 markL1 FoundationCalculatorBoltzmann

In a Boltzmann distribution, the area under the curve represents

Salam Academy Original Practice · Proposed mark scheme

SA-AC-KI-0121 markL1 FoundationCalculatorBoltzmann

The minimum energy colliding particles need to react is the

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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-KI-0062 marksL2 StandardCalculatorRate

[A] falls from

0.80

0.50

mol dm⁻³ in

60

s. Calculate the mean rate in mol dm⁻³ s⁻¹.

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SA-AC-KI-0071 markL2 StandardCalculatorCatalysts

A catalyst increases rate by

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SA-AC-KI-0081 markL2 StandardCalculatorBoltzmann

At high energies, the Boltzmann curve

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SA-AC-KI-0101 markL2 StandardCalculatorRate

The rate at a particular time on a concentration–time graph is found from

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SA-AC-KI-0091 markL3 ExamCalculatorCatalysts

Fe²⁺ ions catalyse the reaction between

\mathrm{S_2O_8^{2-}}

and

\mathrm{I^-}

in aqueous solution. This is

Salam Academy Original Practice · Proposed mark scheme

SA-AC-KI-0111 markL3 ExamCalculatorBoltzmann

Increasing the concentration of a reactant in solution increases rate because

Salam Academy Original Practice · Proposed mark scheme