Chemistry-
General
Easy

Question

In which of the following arrangements the order is NOT according to the property indicated against it

  1. A l to the power of 3 plus end exponent less than M g to the power of 2 plus end exponent less than N a to the power of plus end exponent less than F to the power of minus end exponent : Increasing ionic size  
  2. B less than C less than N less than O : Increasing first ionization enthalpy  
  3. I less than B r less than F less than C l : Increasing electron gain enthalpy (with negative sign)  
  4. L i less than N a less than K less than R b : Increasing metallic radius  

The correct answer is: B less than C less than N less than O : Increasing first ionization enthalpy


    B less than C less than N less than O; When we move from B to O in a periodic table the first ionisation enthalpy increase due to the attraction of nucleous towords the outer most of electron.

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