MCQ
In ${K_4}Fe{\left( {CN} \right)_6},$ $Fe$ is in the form of
- AAn atom
- BAn ion
- CCationic complex
- ✓Anionic complex
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(Given : $K_b$ of water $=0.5\ Kkg/mol$ . ; Atomic mass of $Ca =40$ , $Br =80$)

