IGCSE Chemistry (0620) — October–November 2024, Paper 63
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →When crystals of hydrated calcium ethanedioate, CaC2O4•H2O, are heated they decompose to form solid calcium carbonate, steam and carbon monoxide gas: CaC2O4•H2O(s) → CaCO3(s) +…
Answer this question and get it marked →A student investigates the temperature change when solid P dissolves in water. The student does two experiments. In Experiment 1, 20 cm³ of distilled water is placed in a boiling…
Answer this question and get it marked →A student tests two solids: solid R and solid S. Tests on solid R: Table 3.1 shows the tests and the student's observations for solid R. Test 1 (gently heat about half of solid R…
Answer this question and get it marked →A mixture contains three solid compounds: aluminium oxide, calcium carbonate and calcium chloride. Table 4.1 gives some information about the three compounds in the mixture (name…
Answer this question and get it marked →