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JEE Main202331 Jan 2023Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth floatation Choose the correct answer from the options given below:

Options

  1. AB, D and C only
  2. BC, D and E only
  3. CA and C only
  4. DB, D and E only

Correct answer

C. A and C only

Step-by-step solution

Electrolysis is not a concentration method. Electrolytic refining is a process of refining a metal (mainly copper) by the process of electrolysis. Liquation is not a concentration method. It is a refining method. In this method a low melting metal like tin can be made to flow on a sloping surface. In this way it is separated from higher melting impurities. The other three methods are concentration methods of ores. Leaching is used when the ore is soluble in a solvent. The powdered ore is dissolved in a chemical, us

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