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WAEC Chemistry 2018 Theory — Question 1

Question 1 of 24 from the West African Examinations Council (WAEC) Chemistry 2018 Theory paper, with the correct answer and a full explanation.

1.(a)(i) Define the term fermentation. (ii) Name the catalyst that can be used for this process.

Model answer

(i) Fermentation is the breakdown of sugar into alcohol and carbon (IV) oxide, usually with the aid of micro-organisms such as yeast: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂. (ii) The catalyst (enzyme) is zymase.

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