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Q.60) Which of the following are paramagnetic?

A) $\left[\mathrm{NiCl}_4\right]^{2-}$

B) $\mathrm{Ni}(\mathrm{CO})_4$

C) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$

D) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

 

Answers (1)

best_answer

ble> Complex Oxidation State of Ni Geometry Ligand Type Magnetic Nature A. [NiCl?]²? Ni²? (3d?) Tetrahedral Weak field (Cl?)  Paramagnetic B. Ni(CO)? Ni? (3d?4s²) Tetrahedral Strong field (CO)  Diamagnetic C. [Ni(CN)?]²? Ni²? (3d?) Square planar Strong field (CN?)  Diamagnetic D. [Ni(H?O)?]²? Ni²? (3d?) Octahedral Weak field (H?O) Paramagnetic E. Ni(PPh?)? Ni? (3d?4s²) Tetrahedral Moderate field (PPh?)  Paramagnetic

Hence the correct option is (1)

 

Posted by

Saumya Singh

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