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6. Polar covalent bonds are caused by
- electrolysis
- electrostaticity
- electronegativity
- electrodensity
7. In metallic bonding, the outer shell of electrons is delocalised
8. Which of these intermolecular forces is strongest?
- dipole-dipole forces
- hydrogen bonding
- van der Waals forces
9. hydrogen bonds form between:
- hydrogen atoms and atoms with a slight positive charge
- All of the above
- two hydrogen atoms
- slightly positive hydrogen atoms and lone pairs of electrons on very electronegative atoms
- hydrogen atoms and atoms with a slight negative charge
10. Water expands when frozen due to hydrogen bonding
11. Which of the following is a macromolecular structure?
- Silicon
- Diamond
- All of the above
- Graphite