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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 8 April 2024, Shift 1, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

Match List I with List II LIST I (Compound): A. Fe4[Fe(CN)6]3⋅xH2O\mathrm{Fe_4[Fe(CN)_6]_3\cdot xH_2O}; B. [Fe(CN)5NOS]4−[\mathrm{Fe(CN)_5NOS}]^{4-}; C. [Fe(SCN)]2+[\mathrm{Fe(SCN)}]^{2+}; D. (NH4)3PO4⋅12MoO3\mathrm{(NH_4)_3PO_4\cdot12MoO_3} LIST II (Colour): I. Violet; II. Blood Red; III. Prussian Blue; IV. Yellow Choose the correct answer from the options given below:
  1. (1)A-I, B-II, C-III, D-IV
  2. (2)A-III, B-I, C-II, D-IVOfficial answer
  3. (3)A-II, B-III, C-IV, D-I
  4. (4)A-IV, B-I, C-II, D-III

Official answer

Option 2

NTA final key.

Chapter
The d- and f-Block Elements
Topic
Anion Analysis
Idea tested
Cyanide Prussian Blue Test

Same idea in other shifts

Asked 2× in all
  1. 3 Aug 2021, Shift 2 · Q42In the detection of nitrogen in an organic compound by Lassaigne's test, the iron compounds formed areMediumSingle correct

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.