Oxides: past paper questions
Real questions on oxides
The newest 20 of 51 written questions. Open one to see it on the real paper.
- 0620/31 · May/June 2026 · Q2b(iii)[1]
Explain why aqueous bromine does not react with aqueous sodium chloride.
See it on the paper → - 0620/31 · May/June 2026 · Q6c(ii)[1]
State if cobalt( III ) oxide is an acidic oxide or a basic oxide. Give a reason for your answer. (ii)
See it on the paper → - 0620/32 · May/June 2026 · Q6c(ii)[1]
State if nickel( II ) oxide is an acidic oxide or a basic oxide. Give a reason for your answer.
See it on the paper → - 0620/33 · May/June 2026 · Q6c(ii)[1]
State if titanium( III ) oxide is an acidic oxide or a basic oxide. Give a reason for your answer.
See it on the paper → - 0620/41 · May/June 2026 · Q6a(i)[1]
State the term given to oxides that react with both acids and alkalis.
See it on the paper → - 0620/61 · May/June 2026 · Q3a[1]
Identify the gas given off in test 2.
See it on the paper → - 0620/63 · May/June 2026 · Q3d[1]
Suggest what the sodium carbonate reacts with in test 4 to produce carbon dioxide gas. Tests on solid B Solid B is zinc sulfate. The student dissolves solid B in water to form solution B. The student divides solution B into three approximately equal portions into one boiling tube and two test-tubes. Complete the expect...
See it on the paper → - 0620/42 · February/March 2026 · Q2b(i)[1]
State the type of oxide that reacts with both acids and bases.
See it on the paper → - 0620/42 · October/November 2025 · Q1d[2]
Gaseous oxides of nitrogen are atmospheric pollutants. One adverse effect of oxides of nitrogen is the formation of acid rain. State two other adverse effects of oxides of nitrogen.
See it on the paper → - 0620/42 · October/November 2025 · Q1e(i)[1]
Name the toxic gaseous product of the incomplete combustion of hydrocarbon fuels.
See it on the paper → - 0620/42 · October/November 2025 · Q1e(ii)[2]
Name the two non-toxic gases formed in the catalytic converter.
See it on the paper → - 0620/42 · October/November 2025 · Q4b(ii)[1]
Al (OH) 3 is not an alkali. State what this tells you about the solubility of Al (OH) 3 .
See it on the paper → - 0620/43 · October/November 2025 · Q3d[1]
Gallium has many similarities to aluminium. Gallium( III ) oxide is an amphoteric oxide. State what is meant by the term amphoteric.
See it on the paper → - 0620/43 · October/November 2025 · Q4c[3]
Chlorine reacts with nitrogen to form nitrogen trichloride, NCl 3 . Complete the dot-and-cross diagram in Fig. 4.1 of a molecule of NCl 3 . Show outer shell electrons only. Cl N Cl Cl
See it on the paper → - 0620/32 · May/June 2025 · Q1a[1]
an element which forms an ion with a 2– charge
See it on the paper → - 0620/32 · May/June 2025 · Q1b[1]
an ionic compound
See it on the paper → - 0620/32 · May/June 2025 · Q1c[1]
used as a catalyst
See it on the paper → - 0620/32 · May/June 2025 · Q1d[1]
approximately 21% of clean, dry air
See it on the paper → - 0620/32 · May/June 2025 · Q1e[1]
a gas needed for photosynthesis
See it on the paper → - 0620/32 · May/June 2025 · Q3a(iv)[1]
State whether phosphorus( V ) oxide is an acidic oxide or a basic oxide. Give a reason for your answer.
See it on the paper →
What examiners said
Comprehensive responses • Most candidates identified amphoteric oxides. Limited responses • Some candidates confused the terms neutral and amphoteric.
— Examiner report, February/March 2026, 0620/42 Q2(b)(i) (Cambridge)
There were a wide range of incorrect answers here. Many candidates chose metals as their answer with the most common incorrect answer being ‘calcium’.
— Examiner report, May/June 2025, 0620/32 Q1(a) (Cambridge)
Many candidates could not identify ‘an ionic compound’. ‘Carbon dioxide’ and ‘sulfur dioxide’ were common incorrect answers.
— Examiner report, May/June 2025, 0620/32 Q1(b) (Cambridge)
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