WAEC Biology 2015 Objective — Question 23
Question 23 of 50 from the West African Examinations Council (WAEC) Biology 2015 Objective paper, with the correct answer and a full explanation.
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What is the importance of step II [addition of sodium hydroxide] in the testing process?
- A. to neutralize the sugar solutionCorrect
- B. to soften the sugar solution
- C. to change the colour of the sugar solution
- D. to increase the acid content of the sugar solution
Explanation
Sodium hydroxide is added to neutralize the acid that was added earlier (in the hydrolysis step).
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