CAIE IGCSE Chemistry 6.2 Rate of Reaction Topic Practice

Powdered magnesium carbonate is added to excess dilute hydrochloric acid.
The total volume of gas produced is measured over time.
A graph of the results is shown.

The experiment is repeated but the concentration of the hydrochloric acid is doubled.

All other conditions are kept the same.
Which statements about the second experiment are correct?

1 The final volume of gas is $360 \mathrm{~cm}^{3}$.
2 The reaction finishes before 90 seconds.
3 The activation energy of the reaction is lower.

The equation for the decomposition of hydrogen peroxide, $\mathrm{H}_{2} \mathrm{O}_{2}$, is shown.

In an experiment, the total volume of oxygen produced is $100 \mathrm{~cm}^{3}$.
The experiment is repeated using 1.00 g of a solid catalyst. All other conditions remain the same.
Which row describes the total volume of oxygen and the mass of the catalyst at the end of the second experiment?

The apparatus shown is used to measure the rate of a reaction.

Which equation represents a reaction where the rate can be measured using this apparatus?