Chemistry 0620 · IGCSE · Redox

Redox — practice question

Zinc is obtained from the ore zinc blende by means of two chemical reactions. 1. $\text{2ZnS} + 3\text{O}_2 \rightarrow 2\text{ZnO} + 2\text{SO}_2$ 2. $\text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO}_2$ In reactions 1 and 2, which substance undergoes reduction?

  • Areaction 1: $\text{O}_2$, reaction 2: $\text{C}$
  • Breaction 1: $\text{O}_2$, reaction 2: $\text{ZnO}$
  • Creaction 1: $\text{ZnS}$, reaction 2: $\text{C}$
  • Dreaction 1: $\text{ZnS}$, reaction 2: $\text{ZnO}$

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