IGCSE Science - Combined (0653) — May–June 2023, Paper 51
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →You will estimate the concentration of vitamin C in a sample of fruit juice. When iodine solution is added to a mixture of starch and fruit juice, the starch turns the iodine…
Answer this question and get it marked →You will investigate the components of a fertiliser, which contains an insoluble substance and a soluble salt. Procedure: pour all of the fertiliser into a beaker, add about 20…
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 →You will investigate 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…
Answer this question and get it marked →