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JEE Main Chemistry question

ChemistryCoordination CompoundsJEE Main

Given the molecular formula of the hexacoordinated complexes is (A) , (B) , (C) . If the number of coordinated molecules in , and respectively are 6, 5 and 4, the primary valency in , and are

Answer: (B)

Solution

Each complex has coordination number 6 and the central cobalt is . In (A), all 6 sites are filled by , so all 3 remain outside the sphere as ionisable (primary-valency-satisfying) counter-ions: primary

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Question ID VK-155241