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AP EAMCET202018 Sep 2020Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

Match the items of List-I with those of List-II and choose the correct option given below. ( array |c|c| List-I & List-II A. Calcination & 1. Galena B. Roasting & 2. Magnetite C. Magnetic separation & 3. Pyrometallurgy D. Carbon reduction of metal oxide & 4. Malachite array )

Options

  1. A( array llll A & B & C & D 4 & 1 & 3 & 2 array )
  2. B( array cccc A & B & C & D 4 & 1 & 2 & 3 array )
  3. C( array llll A & B & C & D 2 & 4 & 3 & 2 array )
  4. D( array cccc A & B & C & D 3 & 2 & 1 & 4 array )

Correct answer

B. ( array cccc A & B & C & D 4 & 1 & 2 & 3 array )

Step-by-step solution

(A) Calcination For hydrated carbonate or bicarbonate ores ( (4) ) malachite, ( CuCO ₃ Cu ( OH )₂ ) (B) Roasting For sulphide ores ( ) (1) galena, ( PbS ) (C) Magnetic separation For magnetic ore or gangue ( ) (2) magnetite, ( Fe ₃ O ₄ ) (D) Carbon reduction of metal oxide It is done is furnaces on application of heat ( ) (3) pyrometallurgy The correct matching is (A)-(4), (B)-(1), (C)-(2), (D)-(3)

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