IGCSE Science - Combined (0653) — May–June 2023, 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 estimates the concentration of vitamin C in a sample of fruit juice. When iodine solution is added to a starch + fruit juice mixture, the starch turns the iodine…
Answer this question and get it marked →A student investigates the components of a fertiliser containing insoluble sand and a soluble salt, starting with 5.00 g of fertiliser. Procedure: add distilled water in a beaker,…
Answer this question and get it marked →Cetyl alcohol is a white solid with a melting point of 49 °C; if salt is mixed with cetyl alcohol the melting point decreases. Some apparatus needed to determine the melting point…
Answer this question and get it marked →A student investigates the resistance of different combinations of two identical lamps L and M. Fig. 4.1 shows a circuit using lamp L (power supply, switch, ammeter A, voltmeter V…
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