IB DP Chemistry Higher Level (2023 syllabus) · IB ib-chem-hl
S2 Structure 2: Models of bonding and structure
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Structure 2: Models of bonding and structure
- Explain why the electrical conductivity of silicon increases as temperature increases, whe… (4 marks, Explain)
- Explain why buckminsterfullerene (C₆₀) has a significantly lower melting point than diamon… (4 marks, Explain)
- Explain why carbon nanotubes exhibit exceptionally high tensile strength and are also able… (4 marks, Explain)
- Explain why the melting points of the Group 1 metals decrease down the group from lithium … (4 marks, Explain)
- Explain why the boiling point of hydrogen fluoride (HF) is significantly higher than that … (4 marks, Explain)
- Explain why the carbon–oxygen bond length in the carbonate ion (CO₃²⁻) is intermediate bet… (4 marks, Explain)
- Explain why the bond angle in water (H₂O) is less than the bond angle in ammonia (NH₃), an… (4 marks, Explain)
- Explain why lithium fluoride (LiF) has a significantly higher melting point than lithium i… (4 marks, Explain)
- Explain why calcium fluoride (CaF₂) has a much higher melting point than potassium fluorid… (4 marks, Explain)
- Explain why magnesium oxide has a significantly higher melting point than sodium chloride,… (4 marks, Explain)
- Explain why caesium chloride (CsCl) adopts a different crystal structure from sodium chlor… (4 marks, Explain)
- Explain why the lattice enthalpy of magnesium chloride (MgCl₂) is significantly more exoth… (4 marks, Explain)
- Explain why the bond angle in sulfur dioxide (SO₂) differs from the bond angle in carbon d… (4 marks, Explain)
- Explain why phosphorus(V) chloride (PCl₅) can exist as a stable molecule but nitrogen(V) c… (4 marks, Explain)
- Explain why the electrical conductivity of metals decreases as temperature increases, whil… (4 marks, Explain)
- Explain why metals are generally malleable and ductile, whereas ionic compounds are brittl… (4 marks, Explain)
- Explain why the melting point of tungsten (W) is significantly higher than that of calcium… (4 marks, Explain)
- Explain why the electrical conductivity of copper is much greater than that of manganese, … (4 marks, Explain)
- Explain why graphene is an excellent electrical conductor, whilst diamond is a poor electr… (4 marks, Explain)
- Explain why high-density polyethylene (HDPE) has a higher melting point and greater tensil… (4 marks, Explain)
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