The correct order of electron gain enthalpy with negative sign

Question:

The correct order of electron gain enthalpy with negative sign of $\mathrm{F}, \mathrm{Cl}, \mathrm{Br}$ and $\mathrm{I}$, having atomic

number $9,17,35$ and 53 respectively, is ?

 

  1. $\mathrm{I}>\mathrm{Br}>\mathrm{Cl}>\mathrm{F}$

  2. $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$

  3. $\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}$

  4. $\mathrm{Br}>\mathrm{Cl}>\mathrm{I}>\mathrm{F}$

Correct Option: 3,

Solution:

Solution Not Required

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