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Saturday, 31 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 2 April 2026, Shift 2, Chemistry Q70

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

Among Fe2+^{2+}, Fe3+^{3+}, Cr2+^{2+} and Zn2+^{2+}, the ion that shows positive borax bead test and with highest ionisation enthalpy is:
  1. (1)Fe2+^{2+}
  2. (2)Zn2+^{2+}
  3. (3)Cr2+^{2+}
  4. (4)Fe3+^{3+}Official answer

Official answer

Option 4

NTA final key.

Chapter
The d- and f-Block Elements
Topic
Group 13 & 14
Idea tested
Borax Bead Test Chemistry

Same idea in other shifts

Asked 2× in all
  1. 24 Feb 2021, Shift 1 · Q50Given below are two statements : Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.…MediumTwo statements

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.