Thoria__________________?
Correct answer: B. All A., B. and C.
- A. Has high fusion temperature (> 3000°C) but poor resistance to thermal shock
- B. All A., B. and C.
- C. Which is expensive & radioactive, is used in crucibles for melting high purity metals
- D. Has high resistance to basic slags
Explanation
Thoria has an extremely high melting point, good resistance to basic slags, and is used for high-purity metal crucibles despite its cost and radioactivity. Therefore, all three statements are valid.
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