IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 61
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A student investigates the use of an enzyme for the extraction of juice from apples. The student assembles two beakers A and B with the same volumes of apple puree, adds the same…
Answer this question and get it marked →The student tests some apple juice for its nutrient content. The apple juice tests positive with Benedict's solution and negative with biuret solution. Record in Table 2.1 the…
Answer this question and get it marked →A student investigates the rate of the reaction between solutions H and K. When solutions of H, K and starch are mixed together, a blue-black colour is observed after a period of…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas: hydrogen peroxide - water + oxygen. A catalyst increases the rate of a chemical reaction. Manganese(IV)…
Answer this question and get it marked →A student investigates the stretching of a spring, assembling the spring and a metre rule as shown in Fig. 5.1. Fig. 5.2 shows a full-size diagram of the unstretched spring and…
Answer this question and get it marked →A student investigates the cooling of hot water in a beaker. The student measures the room temperature as 22.0 C, pours 200 cm3 of hot water into a beaker, places a thermometer in…
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