IGCSE Science - Combined (0653) — May–June 2024, Paper 62
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 enzyme concentration on the breakdown of a substance. Catalase is an enzyme found in peas that breaks down hydrogen peroxide into water and…
Answer this question and get it marked →A student investigates the identity of unknown solution X. The student does each test described in Table 2.1 on separate samples of solution X. The observations are shown in Table…
Answer this question and get it marked →When an aqueous salt solution is left in an open container, the mass of the solution decreases. This is because some of the water evaporates. Plan an investigation to determine…
Answer this question and get it marked →A student compares the rate at which hot water cools in a beaker with and without a lid. The apparatus used for the beaker without a lid is shown in Fig. 4.1 (a beaker of water…
Answer this question and get it marked →