C7: Group Chemistry and Halogen Displacement
Official Cambridge & Imperial ESAT specification requirements for Group Chemistry and Halogen Displacement on the Chemistry paper. Understand the syllabus boundaries, spot distractor traps engineered by examiners, and master the 2-step Sub-90 shortcuts that compress solve time well below the 88.8-second cutoff.
Official Syllabus Subtopics
Requirements specified in the UAT-UK framework
- 1Group 7 trends in colour, state, boiling point, and electronegativity
- 2Halogen displacement reactions in aqueous solution: Cl₂ + 2Br⁻ ⟶ 2Cl⁻ + Br₂
- 3Precipitation reactions of halide ions with aqueous silver nitrate
- 4Noble gas electronic stability and inertness applications
Sub-90 Exam Speed Tips
How top candidates solve this spec under the 88.8s clock
A more reactive halogen displaces a less reactive halide ion from solution, releasing coloured halogen molecules.
Fluorine is the most electronegative element; halogen oxidising power decreases down Group 7.
Examiners engineer distractor options using common algebraic expansions and sign slips. Always test structural ratios or invariants before calculating arithmetic values.
Tested Topics in Specification C7
Master the individual question patterns and Sub-90 shortcuts for this specification.
Topics for Specification C7 are foundational to Chemistry. Practice multi-topic questions in the full module mock.
Ready to Master Specification C7 Under Exam Conditions?
Practice timed questions under the authentic Pearson VUE interface with live split stopwatch pacing, dry-wipe scratchpad, and distractor forensics.