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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 26 June 2022, Shift 2, Chemistry Q64

Question 64 of 90 in this shift, Chemistry question 4 of 30, Section A.

The role of depressants in 'Froth Floation method' is to
  1. (1)selectively prevent one component of the ore from coming to the froth.Official answer
  2. (2)reduce the consumption of oil for froth formation.
  3. (3)stabilize the froth.
  4. (4)enhance non-wettability of the mineral particles.

Official answer

Option 1

NTA final key.

Chapter
General Principles and Processes of Isolation of Elements
Topic
Adsorption
Idea tested
Adsorption in Froth Flotation

Same idea in other shifts

Asked 3× in all
  1. 10 Apr 2023, Shift 1 · Q64Which of the following is used as a stabilizer during the concentration of sulphide ores?EasySingle correct
  2. 26 Aug 2021, Shift 2 · Q35Given below are two statements : Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.…MediumTwo statements

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.