IGCSE Chemistry (0971) — May–June 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 →Ethanol can be made by fermentation of sugars found in plants. A by-product of fermentation is carbon dioxide gas. A student made some ethanol: step 1 cut up and crush sugar cane;…
Answer this question and get it marked →A student investigates the reaction between aqueous ammonia and two different aqueous solutions of copper(II) sulfate labelled A and B. Experiment 1: fill a burette with solution…
Answer this question and get it marked →A student tests two solids: solid E and solid F. Table 3.1 shows tests on solid E and the observations. test 1: gently heat half of solid E in a boiling tube - a solution forms,…
Answer this question and get it marked →Solid cobalt(II) oxide is a base which is insoluble in water. It reacts very slowly with cold dilute sulfuric acid to form a solution of cobalt(II) sulfate. Describe how to make…
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