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JEE Main · 2023 · 10 Apr 2023 · Shift 1 · General Principles and Processes of Isolation of Metals

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Which of the following is used as a stabilizer during the concentration of sulphide ores?
  1. (A)Pine oils
  2. (B)Xanthates
  3. (C)Fatty acids
  4. (D)Cresols✓ Correct

Answer: (D)

Solution

In the froth-flotation concentration of a sulphide ore several reagents are added to the oil-water pulp. Collectors such as pine oil, fatty acids and xanthates coat the sulphide particles and make them water-repellent so that they cling to the air bubbles and rise with the froth. A separate duty is done by froth stabilisers, which toughen the bubbles and stop the froth from collapsing too soon; cresols and aniline act in this way. The reagent used as a stabiliser during the concentration of sulphide ores is cresols.

JEE Main · 2023 · 10 Apr 2023 · Shift 1 · Single correct option

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