IGCSE Co-ordinated Sciences (Double Award) 0654 · Chemistry · 70

0654.C7.1.01 — Describe the characteristic properties of acids in terms of their reactions with: (a).metals (b).bases (c).carbonates: past paper questions

6 real questionsasked in 2 of the last 10 exam series2019–2025usually: Which, Describe, What

Real questions on 0654.c7.1.01 — describe the characteristic properties of acids in terms of their reactions with: (a).metals (b).bases (c).carbonates

The newest 6 of 6 written questions. Open one to see it on the real paper.

0654/32 · October/November 2025 · Q5c[1]
Hydrogen chloride dissolves in water to make dilute hydrochloric acid. Describe the effect of dilute hydrochloric acid on blue litmus indicator.
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0654/11 · May/June 2024 · Q22[1]
Which substances produce a gas when reacted with dilute hydrochloric acid?
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0654/21 · May/June 2021 · Q26[1]
Which row about the Contact process is correct?
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0654/22 · May/June 2021 · Q20[1]
What reacts with ammonia gas?
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0654/22 · May/June 2021 · Q25[1]
Which statement about the reaction of sulfur trioxide with water is correct?
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0654/11 · October/November 2019 · Q21[1]
Which row shows the pH values of the liquids?
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What examiners said

Many candidates incorrectly chose option C, rather than the correct option, B. Candidates are required to know that ammonia is a base, and that bases react with acids.
— Examiner report, May/June 2021, 0654/22 Q20 (Cambridge)

Many candidates chose the incorrect option C, rather than the correct option, A. During the Contact process, sulfur trioxide rapidly reacts with water in a very exothermic reaction that causes unreacted sulfur trioxide to decompose to sulfur dioxide and oxygen, and that sulfur dioxide combines with water to form an acidic mist. Candidates should also know that sulfur trioxide combines with concent...
— Examiner report, May/June 2021, 0654/22 Q25 (Cambridge)

Practise this topic

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In the syllabus

70 0654.C7.1.01 — Describe the characteristic properties of acids in terms of their reactions with: (a).metals (b).bases (c).carbonates

Describe the characteristic properties of acids in terms of their reactions with: (a).metals (b).bases (c).carbonates
Describe acids in terms of their effect on the indicators: (a).litmus (b). methyl orange
State that bases are oxides or hydroxides of metals and that alkalis are soluble bases
Describe the characteristic properties of bases in terms of their reactions with acids
Describe alkalis in terms of their effect on the indicators: (a).litmus (b). methyl orange
Describe how to compare neutrality, relative acidity and relative alkalinity in terms of colour and pH using universal indicator
Describe the neutralisation reaction between an acid and an alkali to produce a salt and water (the ionic equation for this reaction is not required)

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