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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 1 February 2024, Shift 1, Chemistry Q69

Question 69 of 90 in this shift, Chemistry question 9 of 30, Section A.

Given below are two statements : Statement (I) : A solution of [Ni(H2O)6]2+\mathrm{[Ni(H_2O)_6]^{2+}} is green in colour. Statement (II) : A solution of [Ni(CN)4]2−\mathrm{[Ni(CN)_4]^{2-}} is colourless. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both Statement I and Statement II are correctOfficial answer
  2. (2)Both Statement I and Statement II are incorrect
  3. (3)Statement I is correct but Statement II is incorrect
  4. (4)Statement I is incorrect but Statement II is correct

Official answer

Option 1

NTA final key.

Chapter
Coordination Compounds
Topic
Crystal Field Theory
Idea tested
Color and d-d Transitions

Same idea in other shifts

Asked 5× in all
  1. 3 Apr 2025, Shift 1 · Q63The correct order of the complexes [Co(NH3)5(H2O)]3+\mathrm{[Co(NH_3)_5(H_2O)]^{3+}} (A), [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}} (B), [Co(CN)6]3−\mathrm{[Co(CN)_6]^{3-}}…MediumSingle correct
  2. 11 Apr 2023, Shift 2 · Q70Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A :…MediumAssertion–reason
  3. 25 Jul 2022, Shift 1 · Q86Consider the following metal complexes : [Co(NH3)6]3+[\mathrm{Co(NH_3)_6}]^{3+} [CoCl(NH3)5]2+[\mathrm{CoCl(NH_3)_5}]^{2+} [Co(CN)6]3−[\mathrm{Co(CN)_6}]^{3-}…MediumNumerical value
  4. 16 Mar 2021, Shift 2 · Q59[Ti(H2O)6]3+\mathrm{[Ti(H_2O)_6]^{3+}} absorbs light of wavelength 498 nm during a d-d transition. The octahedral splitting energy for the above…EasyNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.