JEE Main 25 February 2021, Shift 2, Chemistry Q31

Question 31 of 90 in this shift, Chemistry question 1 of 30, Section A.

Which among the following species has unequal bond lengths ?

(1) $\mathrm{XeF_4}$
(2) $\mathrm{SiF_4}$
(3) $\mathrm{SF_4}$ Official answer
(4) $\mathrm{BF_4^-}$

Official answer

Option 3

NTA final key.

Chapter: Chemical Bonding and Molecular Structure
Topic: VSEPR Theory
Idea tested: See-Saw Geometry (SN=5, 1 LP)

Same idea in other shifts

Asked 2× in all

2 Apr 2025, Shift 2 · Q57Which among the following molecules is (a) involved in $sp^3d$ hybridization, (b) has different bond lengths and (c) has lone pair of…EasySingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.