IGCSE Science - Combined (0653) — October–November 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 are going to investigate the effect of an enzyme used in the large-scale production of apple juice. Apple puree is placed in two boiling tubes E and W; 10 cm3 of enzyme…
Answer this question and get it marked →You are going to investigate the rate of reaction between magnesium and dilute hydrochloric acid. Add 25.0 cm3 of dilute hydrochloric acid to a 100 cm3 beaker, cut a 5 mm length…
Answer this question and get it marked →You are going to investigate the reflection of light by a plane mirror. Fig. 3.1 shows a horizontal line XZ. Line NY is the normal to line XZ at point Y. Line AY meets line XZ at…
Answer this question and get it marked →Plan an investigation to determine the relationship between the temperature of apple juice and the time it takes for ice cubes to melt when added to it. You are provided with: ice…
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