Learn

Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceTwo statementsMediumRecall

JEE Main 26 August 2021, Shift 2, Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30, Section A.

Given below are two statements : Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper. Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using ‘depressants’ in a froth flotation method. Choose the most appropriate answer from the options given below :
  1. (1)Both Statement I and Statement II are true.Official answer
  2. (2)Both Statement I and Statement II are false.
  3. (3)Statement I is true but Statement II is false.
  4. (4)Statement I is false but Statement II is true.

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 Jun 2022, Shift 2 · Q64The role of depressants in 'Froth Floation method' is toMediumSingle correct

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.