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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 12 April 2023, Shift 1, Chemistry Q66

Question 66 of 90 in this shift, Chemistry question 6 of 30, Section A.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for Mg→MgO\mathrm{Mg \rightarrow MgO} at ∼1120 ∘C\sim 1120\,^{\circ}\mathrm{C} Reason R: There is a large change of entropy associated with the change of state In the light of the above statements, choose the correct answer from the options given below
  1. (1)Both A\mathbf{A} and R\mathbf{R} are true and R\mathbf{R} is the correct explanation of A\mathbf{A}Official answer
  2. (2)Both A\mathbf{A} and R\mathbf{R} are true but R\mathbf{R} is NOT the correct explanation of A\mathbf{A}
  3. (3)A\mathbf{A} is true but R\mathbf{R} is false
  4. (4)A\mathbf{A} is false but R\mathbf{R} is true

Official answer

Option 1

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 30 Jun 2022, Shift 1 · Q67ΔG∘\Delta \mathrm{G}^\circ vs T plot for the formation of MgO, involving reaction 2Mg+O2→2MgO2\mathrm{Mg}+\mathrm{O_2}\rightarrow 2\mathrm{MgO},…MediumDiagram basedHas a figure

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.