JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 16 March 2021, Shift 2, Chemistry Q39

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

\mathrm{FeX_2}

and

\mathrm{FeY_3}

are known when

x

and

y

are :

(1) $x$ = F, Cl, Br, I and $y$ = F, Cl, Br, I
(2) $x$ = F, Cl, Br, I and $y$ = F, Cl, BrOfficial answer
(3) $x$ = F, Cl, Br and $y$ = F, Cl, Br, I
(4) $x$ = Cl, Br, I and $y$ = F, Cl, Br, I

Official answer

Option 2

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Stability of Transition Metal Halides

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