JIPMER2005Chemistryd and f Block Elements
In [ NiCl ₄ ]²⁻ , the number of unpaired electrons, are
Options
- A4
- B2
- C3
- D5
Correct answer
B. 2
Step-by-step solution
In [ NiCl ₄ ]²⁻ the oxidation number of Ni is +2 Electronic configuration of Ni aligned & (at no. =28) & Ni =[ Ar ] 3 d^8 4 s^2 & Ni ⁺²=[ Ar ] 3 d^8 aligned or [ Ar ] array |c|c|c|c|c| & & & & array It is evident that in [ NiCl ₄ ]²⁻ the number of unpaired electrons are two.