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JEE Main202227 Jun 2022Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

Match List - I with List - II. List-I List-II A Concentration of gold ore I Aniline B Leaching of alumina II NaOH C Froth stabiliser III SO 2 D Blister copper IV NaCN Choose the correct answer from the options given below.

Options

  1. AA - IV , B - III , C - II , D - I
  2. BA - IV , B - II , C - I , D - III
  3. CA - III , B - II , C - I , D - IV
  4. DA - II , B - IV , C - III , D - I

Correct answer

B. A - IV , B - II , C - I , D - III

Step-by-step solution

i) Copper was smelted in an open furnace. The slightly impure copper had impurities, mostly sulphur dioxide which bubbled up through the copper as it solidified. That gave a blistered surface and the results of the smelting were called blister copper. Copper is purified by electrolytic refining of blister copper. ii) The principle of froth floatation is that sulphide ores are preferentially wetted by pine oil, whereas the gangue particles are wetted by water. Collectors are added to enhance the non-wettability of t

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