IGCSE Chemistry (0620) — October–November 2023, Paper 63
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Hydrated aluminium chloride is a white solid. When heated very strongly it produces steam, hydrogen chloride gas (toxic) and aluminium oxide (white solid). A teacher heats a…
Answer this question and get it marked →A student investigates the reaction between dilute hydrochloric acid and aqueous sodium hydroxide. In Experiment 1, 25 cm³ of dilute hydrochloric acid with methyl orange indicator…
Answer this question and get it marked →A student tests two substances: solid I and solution J. Solid I is chromium(III) sulfate. The student dissolves solid I in water to form solution I, divided into three portions.…
Answer this question and get it marked →You are asked to investigate the effect of temperature on the rate of decomposition of aqueous hydrogen peroxide. Aqueous hydrogen peroxide decomposes to make oxygen gas (hydrogen…
Answer this question and get it marked →