IGCSE Science - Combined (0653) — May–June 2024, Paper 61
4 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 effect of copper sulfate on the enzyme amylase (amylase breaks down starch into maltose; the reaction is followed using iodine solution). The student…
Answer this question and get it marked →A student investigates the reaction of sodium hydrogencarbonate with dilute sulfuric acid (producing carbon dioxide). The student adds one spatula of sodium hydrogencarbonate to…
Answer this question and get it marked →A student determines the density of a wooden block. Fig. 3.1 shows the wooden block drawn to actual size, with height h, width w and length l. Measure the height h, width w and…
Answer this question and get it marked →A thermistor is a type of variable resistor used to measure changes in the temperature of water in a beaker. The resistance R of the thermistor at temperature T is calculated…
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