First slide

Sidgwick's theory

Question

Effective atomic number of central atom in $[Co {({NH}_{3})}_{5} Cl] {Cl}_{2}$ Complex is

Moderate

A

35
B

36
C

37
D

54

Solution

$[Co {({NH}_{3})}_{5} Cl] {Cl}_{2}$ For this,
EAN = Central atom, atomic number- Oxidation number + 2 X number of ligands
EAN = 27-3 +2 (6) =36

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