Cambridge IGCSE · 分析与预测

2025 Cambridge IGCSE Chemistry (0620) 历年真题分析与预测

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

分析模拟试题
难度 3.2/5
总分
160
时间
180 分钟
最高频考点
—

分卷

卷二 選擇題 (Extended): 40 分 · 45 分钟Paper 4 Theory (Extended): 80 分 · 75 分钟Paper 6 Alternative to Practical: 40 分 · 60 分钟

考官重点

官方报告整理

常见失分点

  • 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.

常见误区

  • 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.

等级分数线估算

更新: 2026年6月13日

来源: Cambridge IGCSE grade thresholds (official)
等级分数百分比
A*158/20079%
A132/20066%
B106/20053%
C80/20040%
D67/20034%
E54/20027%
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).

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