IGCSE Chemistry (0620) — May–June 2023, Paper 43
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 H⁺ + OH⁻ → H₂O B Cr³⁺ + 3OH⁻ → Cr(OH)₃ C methane + chlorine → chloromethane + hydrogen chloride D propene + bromine…
Answer this question and get it marked →The symbols of the elements in Period 3 of the Periodic Table are shown: Na, Mg, Al, Si, P, S, Cl, Ar. Use the symbols to answer the questions that follow. Each symbol may be used…
Answer this question and get it marked →Magnesium forms ionic compounds. Magnesium reacts with fluorine to form the ionic compound magnesium fluoride. The electronic configurations of an atom of magnesium and an atom of…
Answer this question and get it marked →Hydrogen is produced by the reaction between zinc and dilute sulfuric acid, H₂SO₄. Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g) A student carries out an experiment using excess zinc and…
Answer this question and get it marked →This question is about electricity and chemical reactions. Aqueous copper(II) sulfate is an electrolyte. The electrolysis of aqueous copper(II) sulfate using inert electrodes…
Answer this question and get it marked →This question is about nitrogen and compounds of nitrogen. Ammonia is manufactured by the reaction between nitrogen and hydrogen in the Haber process. N₂(g) + 3H₂(g) ⇌ 2NH₃(g)…
Answer this question and get it marked →This question is about organic compounds. Propane and chlorine react at room temperature. An equation for the reaction is shown. C₃H₈ + Cl₂ → C₃H₇Cl + HCl State the condition…
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