Chemistry 9701/12 May June 2017 | Cambridge AS Level Past Papers With Mark Scheme

### 1. Atomic Structure and Isotopes:
- Understanding protons, neutrons, and electrons in various species and identifying the molecular formula for different compounds.

### 2. Reactions and Equilibrium:
- Writing equations for reactions (e.g., combustion of metals, nitrogen reactions, and contact process) and understanding the effects of pressure and temperature on equilibrium.

### 3. Bonding and Molecular Structure:
- Determining the molecular geometry, bond angles, and types of bonding in compounds such as ethanol, sulfur dioxide, and aluminum chloride.

### 4. Physical Chemistry:
- Understanding properties of gases under varying conditions, applying the gas laws, and determining molecular formulas based on experimental data.
- Working with reaction pathways and the activation energy of reactions.

### 5. Organic Chemistry:
- Identifying functional groups in organic compounds and understanding their chemical reactivity.
- Examining reaction mechanisms like nucleophilic substitution and dehydration, as well as esterification.

### 6. Group Trends:
- Discussing trends in properties such as ionization energy and solubility across Group 2 and Group 17 elements.