IB Chemistry HL 2.4.3 Alloys Questions
Use real exam questions to analyse alloy composition, explain atomic-scale strengthening and evaluate service properties.
- Syllabus
- First assessment 2025
- Course
- Chemistry HL
- Level
- HL
Exam points
- Analyse alloy composition and distinguish a homogeneous alloy from a composite using constituent and structural evidence.
- Explain at atomic level how substitutional or interstitial atoms distort the lattice and change strength, hardness and malleability.
- Evaluate alloy performance by linking composition to conductivity, ductility, corrosion resistance and service-use requirements.
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IB Chemistry HL 2.4.3 Alloys Questions question 1
[Maximum number: 2]
Titanium and vanadium are consecutive elements in the first transition metal series.
Explain why an aluminium-titanium alloy is harder than pure aluminium.
titanium atoms/ions distort the regular arrangement of atoms/ions OR
titanium atoms/ions are a different size to aluminium «atoms/ions»
prevent layers sliding over each other
Accept diagram showing different sizes of atoms/ions.
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