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If enthalpy of atomisation for

Question:

If enthalpy of atomisation for $\mathrm{Br}_{2(1)}$ is $x \mathrm{~kJ} / \mathrm{mol}$ and bond enthalpy for $\mathrm{Br}_{2}$ is $\mathrm{y} \mathrm{kJ} / \mathrm{mol}$, the relation between them :

  1. is $x=y$

  2. is $x

  3. does not exist

  4. is $x>y$


Correct Option: , 4

Solution:

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