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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Consider the following metallurgical processes (I) Heating impure metal with CO and distilling the resulting volatile carbonyl (boiling point. 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 the absence of air to let the oxide react with unchanged metal sulphide (III) Electrolysis of the mol

Options

  1. A(I), (II) and (III)
  2. B(II), (III) and (I)
  3. C(III), (I) and (II)
  4. D(II), (I) and (III)

Correct answer

C. (III), (I) and (II)

Step-by-step solution

(I) N i ( i m p u r e ) + 4 C O → 50 ° C N i C O 4 v o l a t i l e → 230 ° C N i p u r e + 4 C O ↑ (II) C u 2 S + 3 2 O 2 → Δ C u 2 O + S O 2 C u 2 S + 2 C u 2 O → h i g h t e m p . 6 C u + S O 2 (III) M g C l 2 s → lectrolysis M g 2 + l + 2 C l - l At cathode M g 2 + + 2 e - → M g s At anode 2 C l - l → C l 2 g + 2 e -

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