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JEE Main · 2023 · 31 Jan 2023 · Shift 1 · General Principles and Processes of Isolation of Metals

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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 :
  1. (A)B, D and C only
  2. (B)C, D and E only
  3. (C)A and C only✓ Correct
  4. (D)B, D and E only

Answer: (C)

Solution

Concentration of an ore removes gangue by physical or chemical means, and includes hydraulic washing, froth floatation, magnetic separation and leaching. Liquation is a refining process used for low-melting metals, and electrolysis is a method of reduction and of refining; neither concentrates the ore. The methods not involved in concentration are liquation and electrolysis.

JEE Main · 2023 · 31 Jan 2023 · Shift 1 · Single correct option

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