JEE Advanced · 2012 · 08 Apr 2012 · Paper 2 · Coordination Compounds

WhatsApp Email

NiCl_{2} {P (C_{2} H_{5})_{2} (C_{6} H_{5})}_{2}

exhibits temperature dependent magnetic behaviour (paramagnetic / diamagnetic). The coordination geometries of

Ni^{2 +}

in the paramagnetic and diamagnetic states are respectively

(A)tetrahedral and tetrahedral
(B)square planar and square planar
(C)tetrahedral and square planar✓ Correct
(D)square planar and tetrahedral

Answer: (C)

Solution

In the paramagnetic state, Ni²⁺ adopts sp³ hybridization with tetrahedral geometry, leaving two unpaired electrons in the 3d orbitals. In the diamagnetic state, Ni²⁺ undergoes dsp² hybridization with square planar geometry, where all electrons are paired. The answer is (C): tetrahedral and square planar.

JEE Advanced · 2012 · 08 Apr 2012 · Paper 2 · Single correct option

Practise more: all JEE Advanced PYQs on Coordination Compounds →

More JEE Advanced questions on Coordination Compounds

The total number of all possible isomers for the square planar complex with formula $K [M (NCS) (NO_{2}) ($ gly $)$ ] is ____
( $M =$ metal ion and gly $= NH_{2} CH_{2} COO^{-}$ )
JEE Advanced 2026View solution →
Consider that the coordinating atoms of the ligands in cis- $[Co (NH_{3})_{4} Cl_{2}] Cl$ and mer- $[Co (NH_{3})_{3} Cl_{3}]$ octahedral complexes are at the vertices of an octahedron. The sum of total number of the triangular faces in both the compl …
JEE Advanced 2026View solution →
The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is
JEE Advanced 2025View solution →
The sum of the spin only magnetic moment values (in B.M.) of $[Mn (Br)_{6}]^{3 -}$ and $[Mn (CN)_{6}]^{3 -}$ is ____.
JEE Advanced 2025View solution →
Among the following options, select the option in which each complex in Set-I shows geometrical isomerism and the two complexes in Set-II are ionization isomers of each other.
[ $en = H_{2} NCH_{2} CH_{2} NH_{2}$ ]
JEE Advanced 2024View solution →
Among $V (CO)_{6}$ , $Cr (CO)_{5}$ , $Cu (CO)_{3}$ , $Mn (CO)_{5}$ , $Fe (CO)_{5}$ , $[Co (CO)_{3}]^{3 -}$ , $[Cr (CO)_{4}]^{4 -}$ , and $Ir (CO)_{3}$ , t …
JEE Advanced 2024View solution →