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In group V-A of the periodic table nitrogen forms only a trihalide but other elements form pentahalides also. The reason is

  1. Nitrogen has less affinity towards halogens    
  2. Nitrogen halides are covalent    
  3. Nitrogen undergoes d to the power of 2 end exponent s p to the power of 3 end exponent hybridization    
  4. Nitrogen does not have d-orbitals    

The correct answer is: Nitrogen has less affinity towards halogens


    Acidic character of oxides decreases down the group.

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