Post-UTME Chemistry 2013 Objective — Question 5
Question 5 of 22 from the Post-UTME Screening (Post-UTME) Chemistry 2013 Objective paper, with the correct answer and a full explanation.
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There is a large temperature interval between the melting point and boiling point of a metal because
- A. metals have very high melting points
- B. metal conducts heat very rapidly
- C. melting does not break the metallic bond but boiling doesCorrect
- D. the crystal lattice of metals is easily broken
Explanation
Melting only loosens the rigid lattice structure while the metallic bonding (delocalised electron sea) persists; boiling requires complete separation of atoms, breaking metallic bonds - requiring far more energy and a higher temperature. (No printed answer key for this session; answer worked out independently.)
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