Cambridge IGCSE · 分析與預測
2024 Cambridge IGCSE Chemistry (0620) Past Paper 分析與預測
A comprehensive examiner-led analysis of the October/November 2024 Cambridge IGCSE Chemistry (0620) examination papers. This breakdown covers core and extended papers, highlighting top chapters, common traps, and preparation recommendations.
更新: 2026年6月13日
難度 3.5/5
總分
160
時間
180 分鐘
最高頻課題
—
分卷
卷二 選擇題 (Extended): 40 分 · 45 分鐘Paper 4 Theory (Extended): 80 分 · 75 分鐘Paper 6 Alternative to Practical: 40 分 · 60 分鐘
考官重點
官方報告整理常見失分位
- Omitting state symbols or providing incorrect state symbols for insoluble bases like copper(II) oxide ( CuO(s) ) vs soluble reactants.
- Failing to show all bonds when drawing organic molecules, especially forgetting the lines representing single bonds inside functional groups (like O-H or N-H).
- Using lead pencil to mark baseline in chromatography but writing names with ink, which contaminates the solvent system.
常見誤解
- Assuming that adding a catalyst shifts the position of equilibrium or increases the final yield of products instead of just accelerating both reactions.
- Believing that inert electrodes like carbon/graphite chemically participate in the oxidation/reduction processes.
- Confusing 'homologous series' characteristics with those of 'isomers', particularly regarding molecular mass and physical properties.
失分原因
- Not rounding relative atomic mass values or volumes to the precise decimal places indicated by the prompt (e.g., thallium RAM to one decimal place).
- Leaving out ion charges on either the cation (Mg2+) or anion (O2-) in ionic dot-and-cross diagrams.
- Confusing the distinct colors of specific indicators (methyl orange, thymolphthalein) in acidic vs basic conditions.
等級 cut-off 估算
更新: 2026年6月13日
| 等級 | 分數 | 百分比 |
|---|---|---|
| A* | 158/200 | 79% |
| A | 133/200 | 67% |
| B | 108/200 | 54% |
| C | 84/200 | 42% |
| D | 71/200 | 36% |
| E | 59/200 | 30% |
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).
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