IGCSE Chemistry (0620) — October–November 2024, Paper 31
8 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 shows part of the Periodic Table, with these elements positioned: H (top, above the main block); Na, K, Ca in Groups I-II; Al, P, S, Cl, Ar in the right-hand block; F…
Answer this question and get it marked →Nitrogen molecules are diatomic. State the meaning of the term diatomic.
Answer this question and get it marked →Polluted water can contain harmful substances such as plastics and phosphates. State two other types of harmful substance in polluted water.
Answer this question and get it marked →Fig. 4.1 shows the displayed formula of compound A: a five-carbon chain H–C(H2)–C(H2)–C(H)=C(H)–C(H2)–H, i.e. CH3CH2CH=CHCH3 (pent-2-ene), containing one carbon–carbon double…
Answer this question and get it marked →Table 5.1 shows some properties of five halogens (halogen / melting point /°C / boiling point /°C / atomic radius /nm): fluorine -220, -188, (blank); chlorine -101, -35, 0.099;…
Answer this question and get it marked →This question is about metals. Metals are good electrical conductors. State three other typical physical properties of metals.
Answer this question and get it marked →This question is about acids, bases and salts. Crystals of potassium chloride can be made by reacting an acid with an alkali. Name the acid and the alkali used.
Answer this question and get it marked →A student investigates the reaction of small pieces of zinc with excess dilute sulfuric acid of three different concentrations. The time taken for each reaction to finish is…
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