IGCSE Science - Combined (0653) — May–June 2024, Paper 52
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 enzyme concentration on the breakdown of a substance. Catalase (an enzyme found in peas) breaks down hydrogen peroxide into water and…
Answer this question and get it marked →You are going to investigate the identity of unknown solution X. Pour solution X into test-tubes 1 to 4 and soak a wooden splint in test-tube 4. Do each test in Table 2.1 and…
Answer this question and get it marked →When an aqueous salt solution is left in an open container, the mass of the solution decreases because some of the water evaporates. Plan an investigation to determine the…
Answer this question and get it marked →You are going to compare the rate at which hot water cools in a beaker with and without a lid (a cardboard disc with a small hole). Arrange the equipment as in Fig. 4.1. Add 100…
Answer this question and get it marked →