JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 10 April 2023, Shift 1, Chemistry Q67

Question 67 of 90 in this shift, Chemistry question 7 of 30, Section A.

The compound which does not exist is

(1) $\mathrm{PbEt_4}$
(2) $\mathrm{(NH_4)_2BeF_4}$
(3) $\mathrm{NaO_2}$ Official answer
(4) $\mathrm{BeH_2}$

Official answer

Option 3

NTA final key.

Chapter: The s-Block Elements
Topic: s-Block Elements
Idea tested: Formation of Oxides, Peroxides, and Superoxides

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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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.