Learn

Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 28 June 2022, Shift 1, Chemistry Q64

Question 64 of 90 in this shift, Chemistry question 4 of 30, Section A.

Given are two statements one is labelled as Assertion A and other is labelled as Reason R. Assertion A :Magnesium can reduce Al2O3\mathrm{Al_2O_3} at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO. Reason R : The melting and boiling points of magnesium are lower than those of aluminium. In light of the above statements, choose most appropriate answer from the options given below :
  1. (1)Both A and R are correct, and R is correct explanation of A.
  2. (2)Both A and R are correct, but R is NOT the correct explanation of A.Official answer
  3. (3)A is correct R is not correct.
  4. (4)A is not correct, R is correct.

Official answer

Option 2

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 1 · Q33According to the following diagram, A reduces BO2\mathrm{BO_2} when the temperature is :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.