Consider the following metallurgical processes: (I) Heating impure metal with CO and…
Chemistry · JEE Advanced · NTA Exams — General Principles and Processes of Isolation of Elements
Consider the following metallurgical processes:
(I) Heating impure metal with CO and distilling the resulting volatile metal carbonyl (b.p. 430C) and finally decomposition at 1500-2000C to get the pure metal.
(II) Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide.
(III) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and NaCl to obtain the metal.
The processes used for obtaining magnesium nickel and copper are respectively:
(I) Heating impure metal with CO and distilling the resulting volatile metal carbonyl (b.p. 430C) and finally decomposition at 1500-2000C to get the pure metal.
(II) Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide.
(III) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and NaCl to obtain the metal.
The processes used for obtaining magnesium nickel and copper are respectively:
- I, II and III
- II, III and I
- III, I and II
- II, I and III
Answer
(C) III, I and II
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