(i) Name the method of refining of metals such as Germanium.(ii) In t

1.	(i) Name the method of refining of metals such as Germanium.(ii) In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?(iii) What is the role of coke in the extraction of iron from its oxides?
Answer» (i) Zone refining (ii) Leaching/ Bayer's process (iii) Coke act as a reducing agent resulting in formation of CO.

(i) Name the method of refining of metals such as Germanium.(ii) In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?(iii) What is the role of coke in the extraction of iron from its oxides?

Answer»

(i) Zone refining

(ii) Leaching/ Bayer's process

(iii) Coke act as a reducing agent resulting in formation of CO.