IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 51
6 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 use of an enzyme for the extraction of juice from apples. You are provided with two beakers of apple puree, a solution of an enzyme and some warm…
Answer this question and get it marked →You are going to test some of the apple juice (made in Question 1) for its nutrient content. Procedure: pour about 1 cm depth of apple juice from measuring cylinder A into a…
Answer this question and get it marked →You are going to investigate the rate of the reaction between solutions K and H. When solutions of K, H and starch are mixed together, a blue-black colour is observed after a…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas: hydrogen peroxide - water + oxygen. A catalyst increases the rate of a chemical reaction. Manganese(IV)…
Answer this question and get it marked →You are going to investigate the stretching of a spring. The spring and the metre rule have been set up as shown in Fig. 5.1 (spring hanging from a clamp beside a vertical metre…
Answer this question and get it marked →You are going to investigate the cooling of hot water in a beaker. You are provided with a beaker, a supply of hot water and a thermometer. Procedure: pour 200 cm3 of hot water…
Answer this question and get it marked →