Which one expands on heating ?
Correct answer: A. Silica bricks
- A. Silica bricks
- B. Fireclay bricks
- C. Both A. & B.
- D. Neither A. nor B.
Explanation
Silica bricks undergo marked expansion on heating, especially because of the quartz-to-cristobalite and tridymite transformations. Fireclay bricks show much less of this characteristic permanent expansion, so silica bricks are the intended answer.
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