Chemistry-
General
Easy

Question

The electron affinities of halogens are F equals 322, C l equals 349, B r equals 324, I equals 295 k J m o l to the power of negative 1 end exponent. The higher value for C l as compared to that of F is due to

  1. (a) Weaker electron-electron repulsion in C l  
  2. Higher atomic radius of F  
  3. (c) Smaller electronegativity of F  
  4. More vacant P - subshell in C l  

The correct answer is: (a) Weaker electron-electron repulsion in C l

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The formation of the oxide ion O subscript left parenthesis g right parenthesis end subscript superscript 2 minus end superscript requires first an exothermic and then an endothermic step as shown below
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