IGCSE Chemistry (0620) — October–November 2023, Paper 61
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A student uses chromatography to analyse samples of three different dyes. The apparatus is shown in Fig. 1.1 (a beaker containing ethanol, a piece of chromatography paper with a…
Answer this question and get it marked →Copper(II) carbonate reacts with dilute acids to make carbon dioxide gas. Malachite contains copper(II) carbonate. A student investigates the rate of reaction between powdered…
Answer this question and get it marked →A student tests two substances: solid M and solid N. Solid M is hydrated chromium(III) nitrate. The student places half of solid M in a boiling tube and heats it strongly. The…
Answer this question and get it marked →Greaseaway and Kitchenclean are two solutions used as household cleaners that contain aqueous ammonia. Plan an investigation to find which of the two household cleaners contains…
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