From the magnetic behaviour of ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ (paramagnetic) and $\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$ (diamagnetic), choose the correct geometry and oxidation state.

In which of the following complexes the CFSE, ${\Delta }_o$ will be equal to zero?

The correct order of the following complexes in terms of their crystal field stabilization energies is :

Identify the homoleptic complex(es) that is/are low spin. (A) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}\right]}^{2-}$ (B) ${\left[{\mathrm{CoF}}_6\right]}^{3-}$ (C) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{4-}$ (D) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ (E) ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ Choose the correct answer from the options given below :

Match List - I with List - II. List - I (Complex) List - II (Hybridisation of central metal ion) (A) [CoF6]3- (I) d2sp3 (B) [NiCl4]2- (II) sp3 (C) [Co(NH3)6]3+ (III) sp3d2 (D) [Ni(CN)4]2- (IV) dsp2 Choose the correct answer from the options given below:

${\mathrm{CrCl}}_3\cdot {\mathrm{xNH}}_3$ can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point of $0.558^{\circ }\mathrm{C}$. Assuming $100 \%$ ionisation of this complex and coordination number of Cr is 6 , the complex will be (Given ${\mathrm{K}}_{\mathrm{f}}=1.86\mathrm{K}\mathrm{kg}{\mathrm{mol}}^{-1}$ )

The d-electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is:

The complex that shows Facial - Meridional isomerism is :

Identify the coordination complexes in which the central metal ion has ${\mathrm{d}}^4$ configuration. (A) ${\left[{\mathrm{FeO}}_4\right]}^{2-}$ (B) ${\left[\mathrm{Mn}(\mathrm{CN}{)}_6\right]}^{3-}$ (C) ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{3-}$ (D) (E) ${\left[{\mathrm{NiF}}_6\right]}^{2-}$ Choose the correct answer from the options given below :

One mole of the octahedral complex compound $\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{Cl}}_3$ gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of ${\mathrm{AgNO}}_3$ solution to yield two moles of ${\mathrm{AgCl}}_{(\mathrm{s})}$. The structure of the complex is:

The conditions and consequence that favours the $t_{2\mathrm{g}}{}^3{\mathrm{e}}_{\mathrm{g}}{}^1$ configuration in a metal complex are :

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

Match the LIST-I with LIST-IItable {width: 100%;border-collapse: collapse;margin: 20px 0;}th {background-color: blue;color: white;border: 1px solid lightgrey;padding: 10px;}td {border: 1px solid lightgrey;padding: 10px;text-align: left;}LIST-I (Complex/ Species)LIST-II (Shape & magnetic moment)A. [Ni(CO)4]I. Tetrahedral, 2.8 BMB. [Ni(CN)4]2–II. Square planar, 0 BMC. [NiCl4]2–III. Tetrahedral, 0 BMD. [MnBr4]2–IV. Tetrahedral, 5.9 BMChoose the correct answer from the options given below:

The number of species from the following that are involved in sp3d2 hybridization is :[Co(NH3)6]3+, SF6, [CrF6]3−, [CoF6]3−, [Mn(CN)6]3−, and [MnCl6]3−

Given below are two statements : Statement (I) : In octahedral complexes, when ${\Delta }_{0}P$ low spin complexes are formed. Statement (II) : In tetrahedral complexes because of $\Delta_t In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements:Statement I: A homoleptic octahedral complex, formed using monodentate ligands, will not show stereoisomerism.Statement II: cis- and trans- platin are heteroleptic complexes of Pd.In the light of the above statements, choose the correct answer from the options given below:

An octahedral complex having molecular composition $\mathrm{Co}\cdot 5{\mathrm{NH}}_3\cdot {\mathrm{Cl}}^2.{\mathrm{SO}}_4$ has two isomers A and B. The solution of A gives a white precipitate with ${\mathrm{AgNO}}_3$ solution and the solution of B gives white precipitate with ${\mathrm{BaCl}}_2$ solution. The type of isomerism exhibited by the complex is,

The type of hybridization and the magnetic property of ${\left[{\mathrm{MnCl}}_6\right]}^{3-}$ are,

The d-orbital electronic configuration of the complex among ${\left[\mathrm{Co}(\mathrm{en}{)}_3\right]}^{3+},{\left[{\mathrm{CoF}}_6\right]}^{3-}$, ${\left[\mathrm{Mn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and ${\left[\mathrm{Zn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ that has the highest CFSE is :

The correct order of the complexes ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{H}}_2\mathrm{O}\right)\right]}^{3+}(\mathrm{A}),{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}(\mathrm{B}),{\left[\mathrm{Co}(\mathrm{CN}{)}_6\right]}^{3-}(\mathrm{C})$ and ${\left[\mathrm{CoCl}{\left({\mathrm{NH}}_3\right)}_5\right]}^{2+}(\mathrm{D})$ in terms of wavelength of light absorbed is