IGCSE Chemistry (0971) — October–November 2023, Paper 42
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Using the electronic configurations in Table 1.1 (A 2,5; B 2,8; C 2,8,2; D 2,8,4; E 2,8,5; F 2,8,6; G 2,8,18,7), state which of the atoms or ions A to G could be a noble gas atom.
Answer this question and get it marked →Cobalt and copper are transition elements. Copper has two naturally occurring isotopes, 63Cu and 65Cu. Cobalt has only one, 59Co. Complete Table 2.1 to show the number of protons,…
Answer this question and get it marked →Iron is manufactured in a blast furnace. Three of the starting materials added to the blast furnace are coke, iron ore and limestone. Name the other starting material added to the…
Answer this question and get it marked →This question is about lead(II) chloride, PbCl2. A student prepares a sample of insoluble lead(II) chloride by mixing aqueous solutions of two salts in a beaker. Identify two…
Answer this question and get it marked →Chemical reactions can involve transfer of thermal energy. State the term used for the transfer of thermal energy during a reaction.
Answer this question and get it marked →A homologous series is a family of organic compounds whose members have similar chemical properties. Give two characteristics that are the same for all members of a homologous…
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