0620/42 · May/June 2024
Theory (Extended) · 80 marks · 6 questions
- Question 17 marks
Choosing gases from a list (natural gas, smog and acid rain, unsaturated, monatomic, reducing agent), and the catalytic converter equation.
- Question 214 marks
Metals forming positive ions, the reactivity series and displacement, and iron reacting with steam.
- Question 315 marks
The Haber process: conditions and catalyst, bond energies and ΔH, and making ammonia in the lab with a gas volume calculation.
- Question 414 marks
Ester hydrolysis as an equilibrium: naming the acid and alcohol, effects of changing conditions, and pH change.
- Question 517 marks
Isotopes of sulfur and relative atomic mass, magnesium sulfide, sulfurous acid and its salts, and a redox reaction.
- Question 613 marks
Glucose in photosynthesis and fermentation, making ethanol from ethene and steam, and a dot-and-cross diagram of ethanol.