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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 2 April 2026, Shift 1, Chemistry Q70

Question 70 of 75 in this shift, Chemistry question 20 of 25, Section A.

A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with K2CrO4\mathrm{K_2CrO_4} to give yellow precipitate. When the sodium carbonate extract of the salt solution is heated with conc. HNO3\mathrm{HNO_3} and ammonium molybdate, it resulted a canary yellow precipitate. The cation and anion present in the salt are respectively,
  1. (1)Ca2+\mathrm{Ca^{2+}} and SO42−\mathrm{SO_4^{2-}}
  2. (2)Ba2+\mathrm{Ba^{2+}} and PO43−\mathrm{PO_4^{3-}}Official answer
  3. (3)Mn2+\mathrm{Mn^{2+}} and PO43−\mathrm{PO_4^{3-}}
  4. (4)Ba2+\mathrm{Ba^{2+}} and SO42−\mathrm{SO_4^{2-}}

Official answer

Option 2

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2024, Shift 1 · Q72Match List I with List II LIST I (Name of the test): A. Borax bead test; B. Charcoal cavity test; C. Cobalt nitrate test; D. Flame test…MediumMatch the list

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.