IGCSE Chemistry (0620) — May–June 2025, Paper 31
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: aluminium, ammonia, argon, bromine, carbon dioxide, fluorine, iron, magnesium, magnesium chloride, nitrogen, oxygen, potassium. Each substance may…
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 formed when 1000 cm^3 of sea water is evaporated. Table 2.1…
Answer this question and get it marked →This question is about sulfur and its compounds. Explain why sulfur is placed in Group VI of the Periodic Table.
Answer this question and get it marked →This question is about organic chemistry. Name the process that separates petroleum into its useful components.
Answer this question and get it marked →This question is about metals and their reactions. A student investigates the reaction of four different metals, A, B, C and D, with dilute hydrochloric acid. All other conditions…
Answer this question and get it marked →This question is about ionic and covalent compounds. Complete the word equation to show the reaction between magnesium carbonate and nitric acid. magnesium carbonate + nitric acid…
Answer this question and get it marked →This question is about energy changes in reactions. Table 7.1 shows the results of four experiments. Table 7.1 experiment initial temperature / degrees C final temperature /…
Answer this question and get it marked →This question is about water and air. River water needs to be treated to make it safe to drink. Two of the stages used in the treatment of domestic water are the addition of…
Answer this question and get it marked →