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Which complex compound is most stable?

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Which complex compound is most stable?

(1) [Co(NH3)3 (NO3)3]

(2) [CoCI2(en)2] NO3

(3) [Co(NH3)6]2 (SO4)3

(4) [Co(NH3)4 (H2O)Br] (NO3)2

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1 Answer

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Best answer

Correct option is (2) [CoCI2(en)2] NO3

Due to Chelation effect of (en).

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