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AS & A Level · AS/A Level

Chemistry

Bonding, shape and intermolecular forces

Name: ____________________Date: October 10, 2026
  1. 1.

    Explain why molten sodium chloride conducts electricity but solid sodium chloride does not.

    [3 marks] · no calculator
  2. 2.

    Predict the shape of CO2 and explain why its polar bonds do not produce a permanent molecular dipole.

    [3 marks] · no calculator
  3. 3.

    Compare the H-N-H and H-O-H bond angles in ammonia and water using electron-pair repulsion.

    [3 marks] · no calculator
  4. 4.

    Ethanol has a higher boiling point than dimethyl ether although they share a molecular formula. Explain this difference.

    [3 marks] · no calculator
  5. 5.

    A material is hard, has a very high melting point and does not conduct when solid. Evaluate whether these observations prove it is diamond.

    [4 marks] · no calculator
  6. 6.

    Explain why graphite conducts along its layers and is soft, whereas diamond is insulating and hard, despite both being carbon.

    [4 marks] · no calculator

Original, unofficial practice questions from SubjectScout — not official past-paper questions.

Marking points are indicative, not an official mark scheme. Accept equivalent valid methods and supported interpretations that address the task; award each mark once without requiring the model wording.