IGCSE Chemistry (0620) — May–June 2025, Paper 33
8 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A list of substances is shown: calcium, calcium oxide, carbon, carbon dioxide, chlorine, copper, gold, iodine, neon, nitrogen, oxygen, potassium, sulfur dioxide. Each substance…
Answer this question and get it marked →This question is about sea water and the substances found in sea water. Table 2.1 shows the masses of the compounds present when a 2000 cm^3 sample of sea water is evaporated.…
Answer this question and get it marked →This question is about organic chemistry. Petroleum is a mixture of hydrocarbons and is separated by fractional distillation in an industrial process. State which physical…
Answer this question and get it marked →This question is about nitrogen and its compounds. Explain why nitrogen is in Group V of the Periodic Table.
Answer this question and get it marked →This question is about ionic compounds and simple molecular compounds. Complete the word equation to show the reaction between copper(II) carbonate and nitric acid. copper(II)…
Answer this question and get it marked →This question is about chemical reactions and their energy changes. Tick one box that shows a chemical change. - boiling ethanol - decomposing vegetation - dissolving salt -…
Answer this question and get it marked →This question is about air and water. Water needs to be treated to make it safe to drink. Complete Fig. 7.1 to show the three stages needed in the treatment of domestic water. The…
Answer this question and get it marked →This question is about metals. A student investigates the reaction of four different metals, A, B, C and D, with dilute sulfuric acid. All other conditions are the same. The…
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