Read the given passage and answer the questions number 1 to 5 that follow : In the metallurgy of aluminium, purified Al_(2)O_(3) is mixed with Na_(3)AlF_(6)" or "CaF_(2) which lowers the melting point of the mixture and brings conductivity. The fused matrix is electrolysed. Steel vessal with lining of carbon acts as cathode and graphite anode is used. The overall reaction may be written as : 2Al_(2)O_(3)+3C to 4Al+3CO_(2) This process of electrolysis is widely known as Hall-Heroult process. Thus electrolysis of the molten mass is carried out in an electrolysis cell using carbon electrolysis. The oxygen liberated at anode reacts with the carbon of anode producing CO and CO_(2). This way for each kg of aluminium produced, about 0.5kg of carbon anode is burnt away. What is the role of Na_(3)AlF_(6)" or "CaF_(2) in the metallurgy of aluminium, Al?

Read the given passage and answer the questions number 1 to 5 that fol

1.	Read the given passage and answer the questions number 1 to 5 that follow : In the metallurgy of aluminium, purified Al_(2)O_(3) is mixed with Na_(3)AlF_(6)" or "CaF_(2) which lowers the melting point of the mixture and brings conductivity. The fused matrix is electrolysed. Steel vessal with lining of carbon acts as cathode and graphite anode is used. The overall reaction may be written as : 2Al_(2)O_(3)+3C to 4Al+3CO_(2) This process of electrolysis is widely known as Hall-Heroult process. Thus electrolysis of the molten mass is carried out in an electrolysis cell using carbon electrolysis. The oxygen liberated at anode reacts with the carbon of anode producing CO and CO_(2). This way for each kg of aluminium produced, about 0.5kg of carbon anode is burnt away. What is the role of Na_(3)AlF_(6)" or "CaF_(2) in the metallurgy of aluminium, Al?
Answer» SOLUTION :`Na_(3)AlF_(6)" or "CaF_(2)` lowers the MELTING point of the ore and ALSO INCREASES its conductivity of the molten ore.