Chemistry 0620 · IGCSE · Rate of reaction

Rate of reaction — practice question

The equation representing the decomposition of hydrogen peroxide is given below. $2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text{O}_2$ This reaction is exothermic. If a small amount of catalyst is added, oxygen is formed at a faster rate. Which statement correctly describes the catalyst?

  • AThe catalyst makes the reaction more exothermic.
  • BThe mass of catalyst is the same before and after the reaction.
  • CThe catalyst increases the final volume of oxygen produced.
  • DAll of the catalyst is used up in the reaction.

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