Level 1: Foundation Tier.
Level 2: Common questions found on the foundation and Higher Tiers.
Level 3: Higher Tier only.
None
C1 Atomic structure
C2 The periodic table
C3 Structure and bonding
C4 Chemical calculations
C5 Chemical changes
C6 Electrolysis
C7 Energy changes
C12 Rates and equilibrium
C13 Crude oils and fuels
C14 Organic reactions
C15 Polymers
C8 Chemical analysis
C9 The Earth's atmosphere
C10 The Earth's resources
C11 Using our resources