Chemistry 0620/63 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Gas Collection and Chemical Safety | Identifying errors in gas collection setup, explaining safety risks, suggesting improvements for carbon monoxide collection, and justifying the use of a fume cupboard.

2. Temperature Change in Dissolution | Conducting an experiment to measure temperature changes when dissolving a solid, plotting results on a graph, and calculating the rate of temperature decrease.

3. Qualitative Analysis of Unknown Substances | Identifying an unknown solid using heat tests, precipitation reactions, and flame tests, and interpreting results based on standard qualitative analysis.

4. Titration and Solution Preparation | Measuring volume changes in a reaction, determining unknown concentrations using titration, and explaining endpoint identification.

5. Percentage Composition in a Mixture | Designing an experiment to determine the percentage of calcium carbonate in a sample, using solubility and reaction properties for separation and calculation.

6. Flame Tests and Gas Analysis | Identifying metal ions based on flame colors, using chemical tests for gases, and analyzing reactions with potassium manganate(VII) for sulfite detection.