MHT CET Chemistry Question (2026) — Solution

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A neutral complex is a coordination compound that does not have an overall electrical charge and does not dissociate into ions in solution. K _3[ Fe(CN) _5 NO ] is an ionic complex that dissociates into 3 K ^+ and [ Fe(CN) _5 NO ]^ 3- ions. [ Zn(NH _3)_4]^ 2+ is a cationic complex with a +2 charge. [ Co(NH _3)_5 Cl ]^ 2+ is a cationic complex with a +2 charge. [ Ni(CO) _4] has no overall charge and no counter ions, making it a neutral complex. Answer: [ Ni(CO) _4]