Science Coordinate 0654: C7. Chemical reactions Topical Past Paper Questions
Cambridge IGCSE Science Coordinate (0654) past-paper questions on C7. Chemical reactions, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
When manganese(IV) oxide powder is added to aqueous hydrogen peroxide, the hydrogen peroxide decomposes and forms oxygen gas. $$ hydrogen~peroxide\rightarrow oxygen+water $$ Plan an investigation to determine the relationship between the rate of this reaction and the initial temp…
A student investigates the effect of concentration on the rate of a reaction. Copper carbonate reacts with dilute hydrochloric acid forming carbon dioxide gas. Copper carbonate does not dissolve in or react with water. An aqueous solution is made less concentrated by adding water…
A student investigates which metal ions catalyse a reaction. When aqueous sodium thiosulfate reacts with aqueous iron(III) nitrate the reaction mixture immediately turns dark purple. The colour of this mixture slowly fades. A catalyst will make the purple colour fade more quickly…
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