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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 3 August 2021, Shift 1, Chemistry Q34

Question 34 of 90 in this shift, Chemistry question 4 of 30, Section A.

Ellingham diagram does not predict the
  1. (1)reducing ability of a metal
  2. (2)rate of a reactionOfficial answer
  3. (3)overall free energy of a reaction
  4. (4)feasibility of a reaction

Official answer

Option 2

NTA final key.

Chapter
General Principles and Processes of Isolation of Elements
Topic
Metallurgical Extraction
Idea tested
Ellingham Diagram Basics

Same idea in other shifts

Asked 6× in all
  1. 26 Jun 2022, Shift 1 · Q67Given below are two statements : Statement I : According to the Ellingham diagram, any metal oxide with higher ΔG∘\Delta G^\circ is more…MediumTwo statements
  2. 26 Aug 2021, Shift 1 · Q35Given below are two statements. Statement I : The choice of reducing agents for metals extraction can be made by using Ellingham diagram,…MediumTwo statements
  3. 25 Feb 2021, Shift 1 · Q35Ellingham diagram is a graphical representation of :EasySingle correct
  4. 5 Sep 2020, Shift 1 · Q34An Ellingham diagram provides information about :EasySingle correct
  5. 6 Sep 2020, Shift 2 · Q42For a reaction, 4 M(s)+nO2(g)→2M2On(s)4\,\mathrm{M(s)}+n\mathrm{O_2(g)}\rightarrow 2\mathrm{M_2O_n(s)}, the free energy change is plotted as a function of…MediumSingle 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.