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WAEC Chemistry 2019 Theory — Question 16

Question 16 of 28 from the West African Examinations Council (WAEC) Chemistry 2019 Theory paper, with the correct answer and a full explanation.

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3(b)(ii) Explain briefly why a tightly corked glass bottle filled to the brim with fresh palm-wine shatters on standing for some time. [5 marks]

Model answer

As the glucose inside the palm-wine ferments, carbon(IV) oxide gas is continuously released. Since the bottle is tightly corked and filled to the brim, the gas cannot escape, so it exerts increasing pressure inside the bottle. As fermentation progresses, the pressure eventually becomes too great for the glass to withstand, and the bottle shatters.

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