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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 5 September 2020, Shift 1, Chemistry Q34

Question 34 of 75 in this shift, Chemistry question 9 of 25.

An Ellingham diagram provides information about :
  1. (1)the kinetics of the reduction process.
  2. (2)the conditions of pH and potential under which a species is thermodynamically stable.
  3. (3)the temperature dependence of the standard Gibbs energies of formation of some metal oxides.Official answer
  4. (4)the pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals.

Official answer

Option 3

NTA final key (Sep 2020).

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. 3 Aug 2021, Shift 1 · Q34Ellingham diagram does not predict theEasySingle correct
  3. 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
  4. 25 Feb 2021, Shift 1 · Q35Ellingham diagram is a graphical representation of :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.