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Saturday, 31 October

JEE Main · Chemistry · General Principles and Processes of Isolation of Elements

Ellingham Diagram Phase Changes

JEE Main asked Ellingham Diagram Phase Changes once in the 108 shifts Lumi analysed, on 17 Mar 2021, Shift 1. It belongs to Gibbs Free Energy, in General Principles and Processes of Isolation of Elements (Chemistry).

Updated 2026-10-24

Times asked
1
in 1 shift
Years
1 of 8
First asked
2021
the only year
Pattern
Gone quiet
asked once so far

Questions on this idea a shift, by year

2017–2026. Asked in 2021. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200.03’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Diagram based is the usual form. Skill tested: data or graph.

  • Interpret features of ellingham diagram

Difficulty

Easy 0Medium 1Hard 0

The question was multiple choice.

Every question

The question

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 17 Mar 2021, Shift 1 · Q34The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates :MediumDiagram basedHas a figure

Shift: 17 Mar 2021, Shift 1.

Same topic

Other ideas in Gibbs Free Energy

Gibbs Free Energy has 15 ideas JEE Main has asked; 5 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas