Q. The metal ion in complex A has EAN identical to the atomic number of krypton . A is (At. no. of Cr=24, Fe=26, Pd=46)
A) $\left\lbrack Pd\left( {NH}_{3} \right)_{6} \right\rbrack{Cl}_{4}$
B) $\left\lbrack Cr\left( {NH}_{3} \right)_{5}Cl \right\rbrack{SO}_{4}$
C) ${Na}_{4}\lbrack Fe(CN)_{6}\rbrack$
D) $K_{3}\lbrack Fe(CN)_{6}\rbrack$
Explanation
(c)
EAN=Z$-$(ON)+2 (C.N.)
where, O.N.=oxidation number
C.N.=coordination number
Z = atomic number
$\left\lbrack Fe(CN)_{6} \right\rbrack^{4 -}$ :
EAN=26$-$ (2)+2(6)
=26-2+12=36
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.