Refining of Metals

Q.

Which of the following cannot be used to extract a metal from its ore?

1. Electrolytic reduction

2. Carbon reduction

3. Reaction with oxygen

4. Reaction with more electropositive metal

Q. The process of electrolysis is used for obtaining such metals which are

1. Highly unreactive.
2. Moderately reactive.
3. Less reactive
4. Highly reactive.

Q. Name two metals which are purified by liquation method.