If enthalpy of atomisation for $\mathrm{Br_{2(l)}}$ is $x$ kJ/mol and bond enthalpy for $\mathrm{Br_2}$ is $y$ kJ/mol, the relation between them :

JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 9 January 2020, Shift 1, Chemistry Q28

Question 28 of 75 in this shift, Chemistry question 3 of 25, Section A.

If enthalpy of atomisation for

\mathrm{Br_{2(l)}}

x

kJ/mol and bond enthalpy for

\mathrm{Br_2}

y

kJ/mol, the relation between them :

(1)is $x = y$
(2)is $x > y$ Official answer
(3)is $x < y$
(4)does not exist

Official answer

Option 2

NTA final key (Jan 2020).

Chapter: Thermodynamics (Chemistry)
Topic: Enthalpy and Hess's Law
Idea tested: Enthalpy of Atomization

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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.