Cambridge IGCSE · 分析與預測
2025 Cambridge IGCSE Chemistry (0620) Past Paper 分析與預測
The October/November 2025 Chemistry (0620) examination series demonstrates a balanced distribution of marks across fundamental, organic, and quantitative domains. It reinforces experimental design and precision calculations as critical differentiators between grade bands.
更新: 2026年6月13日
難度 3.2/5
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
- Incorrect stoichiometry when calculating reactants: e.g. failing to divide/multiply moles of hydrochloric acid by 2 in its 1:2 reaction with magnesium.
- Misreading burette scales from top-to-bottom instead of bottom-to-top, leading to completely inverted value deductions.
常見誤解
- Believing that catalysts alter the overall enthalpy change or shift the final equilibrium position of a reversible reaction rather than merely increasing the forward and backward rates equally.
失分原因
- Omitting key observations during active reactions (e.g., missed mentioning the rapid dissolution of a metal or the specific color shifts of methyl orange).
- Losing track of state symbols when completing balance sheets for neutralisation pathways.
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 | 132/200 | 66% |
| B | 106/200 | 53% |
| C | 80/200 | 40% |
| D | 67/200 | 34% |
| E | 54/200 | 27% |
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).
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