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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 26 August 2021, Shift 1, Chemistry Q44

Question 44 of 90 in this shift, Chemistry question 14 of 30, Section A.

Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3\mathrm{HNO_3} (iii) AgNO3\mathrm{AgNO_3}? [figure: four hexagonal-ring structures labelled I, II, III, IV]

The figure, in words

Four hexagonal rings drawn as hexagons with inner circle. I: Cl at upper-right and H3C\mathrm{H_3C} at lower-left (opposite positions). II: Cl at top-right vertex and CH3\mathrm{CH_3} at bottom vertex. III: Br at upper-right vertex and CH3\mathrm{CH_3} at lower-right vertex (adjacent). IV: Cl at upper-right vertex and CH2I\mathrm{CH_2I} at lower-right vertex (adjacent).
  1. (1)I
  2. (2)II
  3. (3)III
  4. (4)IVOfficial answer

Official answer

Option 4

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 30 Jan 2024, Shift 1 · Q74Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :…EasyAssertion–reason

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.