JEE Main 2022 · 29 Jul · Shift 2 · Chemistry Q86

ChemistryInteger+4 / -1Question 86 of 90

Sum of oxidation state (magnitude) and coordination number of cobalt in Na[Co(bpy)Cl $_4$ ] is _______.

(Given: bpy = 2,2′-bipyridine, structure shown)

Your answer

Answer and worked solution

Official answer: 9

Cobalt. With one Na⁺, four Cl⁻ and neutral bpy, Co is +3. bpy is bidentate, so the coordination number is 2 + 4 = 6. Sum 9.

Answer: 9

JEE Main 2022 · 29 Jul · Shift 2, Chemistry question 86