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GCSE - OCR Gateway - Topic Questions - Combined Science (Chemistry)
Foundation Level
Paper 3
Topic 1:
Topic 2:
Questions:
- Bonding (Chemical bonds, Ionic bonding + ionic compounds, Covalent bonding Metallic bonding)
- The three states of matter + particle model
- State symbols
- Properties of ionic compounds
- Properties of metals & alloys
- Metals as conductors
- Structure and bonding of carbon (Diamond, Graphite (and related carbon bonding /structure))
Mark schemes:
- Bonding (Chemical bonds, Ionic bonding + ionic compounds, Covalent bonding Metallic bonding)
- The three states of matter + particle model
- State symbols
- Properties of ionic compounds
- Properties of metals & alloys
- Metals as conductors
- Structure and bonding of carbon (Diamond, Graphite (and related carbon bonding/structure))
Topic 3:
Paper 4
Topic 1:
Topic 2:
Topic 3:
Questions:
- Purity, formulations and chromatography
- Identification of common gases (incl Hydrogen, oxygen, carbon dioxide, chlorine tests)
- Identification of ions by chemical and spectroscopic means (Flame tests (metal ions), Tests for carbonate, sulfate, halides (Awareness of instrumental methods like flame emission spectroscopy))
Mark schemes:
- Purity, formulations and chromatography
- Identification of common gases (incl Hydrogen, oxygen, carbon dioxide, chlorine tests)
- Identification of ions by chemical and spectroscopic means (Flame tests (metal ions), Tests for carbonate, sulfate, halides (Awareness of instrumental methods like flame emission spectroscopy)
Topic 4:
Higher Level
Paper 9
Topic 1:
Topic 2:
Topic 3:
Topic 4:
Topic 5:
Paper 10
Topic 1:
Questions:
- Reversible reactions and dynamic equilibrium
- Factors affecting rate: temperature, concentration, pressure (gases), surface area, catalysts
- Measuring rate (gas volume, mass loss, precipitate)
- Effect of changing conditions (temperature, concentration, pressure) on equilibrium (Le Chatelier-style reasoning)
- Collision theory + activation energy (Higher expects stronger application)
- Interpreting rate graphs (including steepness/gradient idea)
Mark schemes:
- Reversible reactions and dynamic equilibrium
- Factors affecting rate: temperature, concentration, pressure (gases), surface area, catalysts
- Measuring rate (gas volume, mass loss, precipitate)
- Effect of changing conditions (temperature, concentration, pressure) on equilibrium (Le Chatelier-style reasoning)
- Collision theory + activation energy (Higher expects stronger application)
- Interpreting rate graphs (including steepness/gradient idea)
Topic 2:
Questions:
Mark schemes:
Topic 3:
Topic 4: