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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 4 April 2025, Shift 2, Chemistry Q56

Question 56 of 75 in this shift, Chemistry question 6 of 25, Section A.

Given below are two statements : Statement (I) : For ClF3\mathrm{ClF_3} (with lone pairs on Cl), all three possible structures may be drawn as follows. [figure: three trigonal-bipyramidal structures I, II, III of ClF3 with Cl at centre, three F atoms and two lone pairs drawn as orbitals] Statement (II) : Structure III is most stable, as the orbitals having the lone pairs are axial, where the lp - bp repulsion is minimum. In the light of the above statements, choose the most appropriate answer from the options given below :

The figure, in words

Three drawings (I, II, III) of ClF3 as trigonal bipyramids with Cl at centre, three F atoms and two lone-pair orbitals: in I both lone pairs are equatorial (F above and below, one F to the right); in II one lone pair is axial and one equatorial; in III both lone pairs are axial.
  1. (1)Both Statement I and Statement II are correct
  2. (2)Both Statement I and Statement II are incorrect
  3. (3)Statement I is correct but Statement II is incorrectOfficial answer
  4. (4)Statement I is incorrect but Statement II is correct

Official answer

Option 3

NTA final key.

Chapter
Chemical Bonding and Molecular Structure
Topic
VSEPR Theory
Idea tested
Trigonal Bipyramidal Positions

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.