The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :
Show Hint
- liquation
- vapour phase refining
- distillation
- zone refining
The Correct Option is A
Solution and Explanation
Step 2: The metal (low melting point, e.g. Sn, Pb, Bi, Hg) melts and flows down, leaving the infusible, high-melting impurities behind.
Step 3: Other methods: vapour phase refining needs a volatile compound (Mond, van Arkel); distillation suits volatile metals (Zn, Hg) with non-volatile impurities; zone refining relies on different solubility of impurities in molten and solid metal (Si, Ge).
Answer: (A) liquation
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