CSEC Integrated Science · May/June 2016 · Paper 2 · Question 3(c)(iii)
Explain the scientific principle by which antacids relieve digestive problems.
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Practise this questionOther parts of this question
- 3(a)Suggest THREE habits, other than brushing regularly, that could explain why Cindy has fewer cavities than her twin Joan.[3 marks]
- 3(b)(i)Name a substance that can be used to measure the pH of toothpaste.[1 mark]
- 3(b)(ii)Arrange the four toothpaste brands in descending order of acidity (most acidic first) using their letters.[2 marks]
- 3(b)(iii)Identify the toothpaste brand with an incorrect pH in Table 2 and give a reason.[2 marks]
- 3(b)(iv)State a possible source of error that may have caused Frank to obtain the incorrect result.[1 mark]
- 3(b)(v)State ONE component in toothpaste that helps strengthen teeth.[1 mark]
- 3(c)(i)Name ONE acidic and ONE alkaline substance present in the human digestive system.[2 marks]
- 3(c)(ii)Name ONE digestive enzyme that operates best in an alkaline medium.[1 mark]
More practice: the rest of this paper · more Acids, Bases, Mixtures and Household Chemicals questions · all CSEC Integrated Science past papers