IGCSE Science - Combined (0653) — October–November 2023, 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 exercise on the heart rate of a fit and healthy person, using an electrocardiogram (ECG) to record heart beats. Fig. 1.1 shows an ECG for one…
Answer this question and get it marked →A student investigates the reaction between iron and a dilute acid (slow at room temperature). The student adds dilute acid to a boiling tube, adds excess iron powder, stirs, and…
Answer this question and get it marked →Citric acid reacts with aqueous sodium hydroxide as shown: citric acid + sodium hydroxide → sodium citrate + water. In the reaction, aqueous sodium hydroxide is neutralised by…
Answer this question and get it marked →A student compares the conducting properties of metal and glass using the apparatus in Fig. 4.1 (a metal container and a glass beaker, a thermometer, clamp stand). The student…
Answer this question and get it marked →← October–November 2023 Paper 63 · October–November 2023 Paper 61 →