Question

Which of the following sets are correctly matched?
I) Hg — distillation
II) Cu — poling
III) B — zone refining
IV) Ti — liquation

• A. I, III & IV only
• B. I, II & III only
• C. II, III & IV only
• D. I, II, III & IV

Hint:

Match metal refining methods based on their volatility or impurity types. Liquation is not used for titanium.

Answer 1

The Correct Option is B

I) Mercury (Hg) is refined by distillation since it is volatile — correct.
II) Copper (Cu) is refined by poling — correct.
III) Boron (B) is purified by zone refining — correct.
IV) Titanium (Ti) is purified by Van Arkel method, not liquation — incorrect.