Consider the following metallurgical processes: (I) Heating impure metal with CO and distilling the resulting volatile carbonyl (b.p. 43^(@)C) and finally decomposition at 150^(@)-200^(@)C to get the pure metal. (II) Heating the sulphide ore in air until a part is converted to oxide and then further heating in theabsence of air to let the oxide react with unchanged metal sulphide. (III) Electrolysis of the moltenelectrolyte containing approximatelyequal amounts of the metal chloride and NaCl to obtain the metal. The processes used for obtaining magnesium , nickel and copper are respectively.

Consider the following metallurgical processes: (I) Heating impure me

1.	Consider the following metallurgical processes: (I) Heating impure metal with CO and distilling the resulting volatile carbonyl (b.p. 43^(@)C) and finally decomposition at 150^(@)-200^(@)C to get the pure metal. (II) Heating the sulphide ore in air until a part is converted to oxide and then further heating in theabsence of air to let the oxide react with unchanged metal sulphide. (III) Electrolysis of the moltenelectrolyte containing approximatelyequal amounts of the metal chloride and NaCl to obtain the metal. The processes used for obtaining magnesium , nickel and copper are respectively.
Answer» (I), (II) and (III) (II), (III) and (I) (III), (I) and (II) (II), (I) and (III) ANSWER :C