NEET Solved Paper 2018 Question 28

Question: The geometry and magnetic behaviour of the complex $ [\text{ Ni(CO}{{)}_4}] $ are [NEET - 2018]

Options:

A) Square planar geometry and paramagnetic

B) Tetrahedral geometry and diamagnetic

C) Square planar geometry and diamagnetic

D) Tetrahedral geometry and paramagnetic

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Answer:

Correct Answer: B

Solution:

  • $ \text{Ni(28): }[\text{ Ar }]\text{ 3}{d^{8}}4{s^{2}} $ $ \because CO $ is a strong field ligand Configuration would be : For, four ?CO?-ligands hybridisation would be $ s{p^{3}} $ and thus the complex would be diamagnetic and of tetrahedral geometry.