JEE Main 2019 Chemistry question

ChemistryCoordination CompoundsJEE Main 2019

The coordination numbers of Co and Al in [Co(Cl)(en)]Cl and K[Al(CO)], respectively, are: (en = ethane-1,2-diamine)

Answer: (D)

Solution

Co: 1 + 2 × 2 = 5; Al: 3 × 2 = 6.

Question ID VK-010777