Post-UTME Biology 2011 Objective — Question 12
Question 12 of 24 from the Post-UTME Screening (Post-UTME) Biology 2011 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 the 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 lattice while metallic bonding persists; boiling requires complete separation of atoms, needing much more energy. (Note: this question is a near-duplicate of one found in the FUTO 2013/2014 Type D session in this same PDF set; the same independently-worked answer is used here.)
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