IGCSE Science - Combined (0653) — May–June 2025, 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 nutrient content of three colourless drinks, A, B and C. Procedure The student: step 1 adds 2 cm3 of drink A, drink B and drink C to separate clean…
Answer this question and get it marked →Invertase is an enzyme. Invertase breaks down the non-reducing sugar sucrose into reducing sugars: non-reducing sugar sucrose --(invertase)-- reducing sugars Benedict's solution…
Answer this question and get it marked →A student investigates aqueous H. Part (a): investigating the rate of reaction of aqueous H with magnesium. Procedure The student: step 1 pours 25 cm3 of aqueous H into a beaker…
Answer this question and get it marked →A student investigates the period T of a pendulum. Fig. 4.1 shows a bob attached to a string. The string is clamped so that the centre of the bob is a distance x above the bench.…
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