JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 25 February 2021, Shift 1, Chemistry Q37

Question 37 of 90 in this shift, Chemistry question 7 of 30, Section A.

The correct statement about

\mathrm{B_2H_6}

is :

(1)All B $-$ H $-$ B angles are of $120^\circ$ .
(2)The two B $-$ H $-$ B bonds are not of same length.
(3)Terminal B $-$ H bonds have less $p$ -character when compared to bridging bonds.Official answer
(4)Its fragment, $\mathrm{BH_3}$ , behaves as a Lewis base.

Official answer

Option 3

NTA final key.

Chapter: The p-Block Elements
Topic: Group 13 & 14
Idea tested: Diborane Structure

Same idea in other shifts

Asked 4× in all

24 Jun 2022, Shift 1 · Q70Identify the correct statement for $\mathrm{B_2H_6}$ from those given below. (A) In $\mathrm{B_2H_6}$ , all B-H bonds are equivalent. (B)…MediumOther
25 Jun 2022, Shift 1 · Q65Number of electron deficient molecules among the following $\mathrm{PH_3}$ , $\mathrm{B_2H_6}$ , $\mathrm{CCl_4}$ , $\mathrm{NH_3}$ ,…MediumSingle correct
22 Jul 2021, Shift 2 · Q39Given below are the statements about diborane. (a) Diborane is prepared by the oxidation of $\mathrm{NaBH_4}$ with $\mathrm{I_2}$ . (b)…MediumOther

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.