Which of the following does not have a sharp melting point ?
Correct answer: B. Glass
- A. Thoria
- B. Glass
- C. Ice
- D. Pig iron
Explanation
Glass softens over a temperature range because it is an amorphous material and lacks a long-range crystal lattice. Thoria, ice and pig iron are crystalline substances with defined melting or fusion ranges, although pig iron may vary with composition.
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