Practise

Question bank

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

12 questions

SA-OC-RA-0011 markL1 FoundationCalculatorRate factors

Which change increases the rate of reaction between marble chips and acid?

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0052 marksL1 FoundationCalculatorRate graphs

90\ \mathrm{cm^3}

of hydrogen is collected in

45

s. Calculate the mean rate in

\mathrm{cm^3/s}

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0121 markL1 FoundationCalculatorRate factors

A catalyst at the end of a reaction is

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0021 markL2 StandardCalculatorCollision theory

Increasing temperature increases rate mainly because

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0031 markL2 StandardCalculatorCollision theory

A catalyst increases rate by

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0041 markL2 StandardCalculatorCollision theory

Increasing the pressure of a gaseous reaction increases the rate because

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0061 markL2 StandardCalculatorRate graphs

On a graph of gas volume against time, the reaction is fastest

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0071 markL2 StandardCalculatorRate graphs

The curve levels off because

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0081 markL2 StandardCalculatorRate factors

The same mass of magnesium reacts with excess acid at

20\,^\circ\mathrm{C}

and at

40\,^\circ\mathrm{C}

. The final volume of hydrogen is

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0091 markL2 StandardCalculatorRate graphs

In the sodium thiosulfate experiment, rate is measured by

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0101 markL2 StandardCalculatorRate graphs

A cross disappears after

40

s. Using rate

=\frac{1}{\text{time}}

, calculate the relative rate in

\mathrm{s^{-1}}

Salam Academy Original Practice · Proposed mark scheme

SA-OC-RA-0111 markL3 ExamCalculatorCollision theory

Doubling the concentration of acid (with excess magnesium) affects the reaction by

Salam Academy Original Practice · Proposed mark scheme