Cambridge IGCSE · 分析与预测

2024 Cambridge IGCSE Chemistry (0620) 历年真题分析与预测

The October/November 2024 IGCSE Chemistry 0620 suite provides a comprehensive evaluation of Core and Extended concepts across multiple-choice, theory, and practical papers. Key areas of focus include chemical energetics (temperature changes during dissolution), stoichiometry (mole calculations, limiting reactants, gas volumes), qualitative analysis (identification of ions and gases), and organic chemistry (alkanes, alkenes, alcohols, and polymers).

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

  • Confusing the observations for copper(II) carbonate in acid (effervescence and blue solution) with flame test results or precipitate colors.
  • Writing incomplete ionic half-equations for the electrolysis of aqueous copper(II) sulfate, often forgetting state symbols or failing to balance electrons.
  • Incorrectly calculating empirical formulas by dividing percentages by atomic numbers instead of relative atomic masses.
  • Stating that universal indicator is suitable for titration endpoints instead of indicators which show sharp color changes like thymolphthalein.

常见误区

  • Believing that catalysts increase the yield of products in reversible reactions rather than just increasing the rate at which equilibrium is reached.
  • Thinking that exothermic reactions have products with higher chemical energy than reactants, leading to wrong reaction pathway diagrams.
  • Assuming that all metals displace each other from solutions regardless of their position relative to hydrogen in the reactivity series.

失分原因

  • Forgetting to label graph axes or lines of best fit in the rate and temperature change plotting questions.
  • Failing to state units (e.g., °C/s or mol/dm³) when requested in rate calculations.
  • Not dividing the mass of the initial mixture when calculating percentages in separation planning questions.

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*155/20078%
A131/20066%
B107/20054%
C83/20042%
D72/20036%
E61/20031%
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).

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