MCQ
Which of the following complexes is strongest reducing agent
- ✓$[Co(CN)_6]^{-4}$
- B$[Co(CN)_6]^{-3}$
- C$[Ag(CN)_2]^{-1}$
- D$[Co(CN)_4]^{-3}$
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$\left.\left. K _3\left[ Fe ( CN )_6\right]( K ),\left[ Co \left( NH _3\right)_6\right] Cl _3( L ), Na _3[ Co \text { (oxalate })_3\right]( M ),\left[ Ni _2 H _2 O \right)_6\right] Cl _2( N ) \text {, }$ $K _2\left[ Pt ( CN )_4\right]( O ) \text { and }\left[ Zn \left( H _2 O \right)_6\right]\left( NO _3\right)_2( P ) $ the diamagnetic complexes are
($R $ = alkyl group; $en$ = ethylenediamine)
