JEE Main 2021 · ChemistryMultiple choiceOtherMediumConceptual

JEE Main 22 July 2021, Shift 2, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

Given below are the statements about diborane. (a) Diborane is prepared by the oxidation of

\mathrm{NaBH_4}

with

\mathrm{I_2}

. (b) Each boron atom is in

sp^2

hybridized state. (c) Diborane has one bridged 3 centre-2-electron bond. (d) Diborane is a planar molecule. The option with correct statement(s) is :

(1)(a) and (b) only
(2)(c) only
(3)(c) and (d) only
(4)(a) onlyOfficial answer

Official answer

Option 4

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
25 Feb 2021, Shift 1 · Q37The correct statement about $\mathrm{B_2H_6}$ is :MediumSingle 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.