IB Chemistry HL 3.1.4 Group Trends Questions
Use real exam questions to connect electron loss or gain with Group 1 and Group 17 reactivity, equations and displacement evidence.
- Syllabus
- First assessment 2025
- Course
- Chemistry HL
- Level
- HL
Exam points
- Analyse the Group 1 trend in metallic character and reaction with water, linking electron loss to reactivity and writing the required equation or observation.
- Analyse the Group 17 trend in non-metallic character and halogen reactivity, linking electron gain and oxidizing strength to the observed trend.
- Predict and justify Group 17 halide-displacement outcomes or comparative Group 1/17 reactivity with balanced ionic equations, colour evidence and periodic-trend reasoning.
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IB Chemistry HL 3.1.4 Group Trends Questions question 1
[Maximum number: 1]
Bleaches in which chlorine is the active ingredient are the most common, although some environmental groups have concerns about their use.
Describe the colour change that occurs when aqueous chlorine is added to aqueous sodium bromide.
from (pale) green/colourless to yellow/orange/brown;
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