Expert Chemistry Tutoring

Q1 Knowledge Recall (2 marks)

Define the term collision theory.

Q2 Application (3 marks)

Explain why increasing the temperature of a reaction speeds it up.

Q3 Calculations (4 marks)

A reaction takes 10 minutes at 25 °C. Calculate the time taken for the same reaction at 50 °C, given that the temperature coefficient (Q10) is 2.

Q4 Application (2 marks)

State the effect of increasing the surface area of a solid reactant on the rate of reaction.

Q5 Knowledge Recall (1 mark)

Name one catalyst used in the Haber process.

Q6 Application (3 marks)

Explain how a catalyst affects the rate of a reaction.

Q7 Knowledge Recall (1 mark)

State the units of concentration.

Q8 Calculations (4 marks)

A reaction has a rate constant of 0.025 s^-1. Calculate the half-life of the reaction.

Q9 Application (3 marks)

Explain why the rate of a reaction decreases as the concentration of reactants decreases.

Q10 Knowledge Recall (2 marks)

Name two factors that do not affect the rate of reaction.