Chemistry 4CH1/1CR May Jun 2019 | Edexcel International GCSE Past Papers With Mark Scheme

Edexcel International GCSE Chemistry (4CH1) Jun 2019

معلم موافق رایگان بودن است.

1. States of Matter and Changes: Identifying phase transitions like melting, evaporation, sublimation, and condensation; particle arrangement in solids.

2. Group 1 Elements and Reactions: Potassium reaction with water, color change in universal indicator, pH determination, and balanced equations for sodium oxidation.

3. Chromatography and Solubility: Paper chromatography experiment, solvent selection, Rf value calculation, and identification of soluble and insoluble dyes.

4. Hydrocarbons and Combustion: Definition of hydrocarbons, complete and incomplete combustion of pentane, formation of toxic carbon monoxide.

5. Reaction Rates and Collision Theory: Effect of surface area, concentration, and temperature on reaction rate, marble chips experiment with hydrochloric acid.

6. Polymers and Plastics: Structure of poly(chloroethene), empirical formula calculations, and polymerization reactions involving chloroethene.

7. Ionic Compounds and Salts: Formation of magnesium nitrate from nitric acid and magnesium oxide, purification methods, and percentage yield calculations.