IGCSE Chemistry (0620) — May–June 2023, Paper 41
7 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Some symbol equations and word equations, A to J, are shown. A Fe³⁺ + 3OH⁻ → Fe(OH)₃ B H⁺ + OH⁻ → H₂O C ethane + chlorine → chloroethane + hydrogen chloride D C₁₂H₂₆ → C₈H₁₈ +…
Answer this question and get it marked →The symbols of the elements in Period 2 of the Periodic Table are shown: Li, Be, B, C, N, O, F, Ne. Use the symbols to answer the questions that follow. Each symbol may be used…
Answer this question and get it marked →This question is about ionic and covalent compounds. Sodium reacts with oxygen to form the ionic compound sodium oxide. The electronic configurations of an atom of sodium and an…
Answer this question and get it marked →Oxygen is produced by the decomposition of aqueous hydrogen peroxide. Manganese(IV) oxide, MnO₂, is a catalyst for this reaction. State the meaning of the term catalyst.
Answer this question and get it marked →This question is about electricity and chemical reactions. The electrolysis of concentrated aqueous potassium bromide using graphite electrodes forms hydrogen at the cathode and…
Answer this question and get it marked →This question is about sulfur and compounds of sulfur. Sulfur is converted into sulfuric acid, H₂SO₄, by the Contact process (stage 1: molten sulfur → sulfur dioxide; stage 2: SO₂…
Answer this question and get it marked →This question is about organic compounds. Butane reacts with chlorine in a photochemical reaction. C₄H₁₀ + Cl₂ → C₄H₉Cl + HCl State the meaning of the term photochemical.
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