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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceOtherMediumRecall

JEE Main 31 January 2024, Shift 1, Chemistry Q68

Question 68 of 90 in this shift, Chemistry question 8 of 30, Section A.

Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from chromates. C. The green manganate ion is diamagnetic. D. Dark green coloured K2MnO4\mathrm{K_2MnO_4} disproportionates in a neutral or acidic medium to give permanganate. E. With increasing oxidation number of transition metal, ionic character of the oxides decreases. Choose the correct answer from the options given below:
  1. (1)B, D, E onlyOfficial answer
  2. (2)A, B, C only
  3. (3)B, C, D only
  4. (4)A, D, E only

Official answer

Option 1

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Disproportionation of Manganate(VI)

Same idea in other shifts

Asked 2× in all
  1. 29 Jun 2022, Shift 1 · Q87An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese…MediumNumerical value

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 42 of the 174 JEE Main shifts held from 2017 to 2026.