Coordination Compounds

Which of the following has the longest C–O bond length? (Free C–O bond length in \ce{CO} is $1.128$ Å.)

The correct increasing order of trans-effect of the following species is:

Jahn-Teller effect is not observed in high spin complexes of:

The correct order of the stoichiometries of \ce{AgCl} formed when \ce{AgNO3} in excess is treated with the complexes \ce{CoCl3.6NH3}, \ce{CoCl3.5NH3}, \ce{CoCl3.4NH3} respectively is:

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $\ce{Co^3+}$ is:

An example of a sigma-bonded organometallic compound is:

Pick out the correct statement with respect to \ce{[Mn(CN)6]^3-}:

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code: Column I (a) $\ce{Co^3+}$ (b) $\ce{Cr^3+}$ (c) $\ce{Fe^3+}$ (d) $\ce{Ni^2+}$ Column II (i) $\sqrt{8}$ BM (ii) $\sqrt{35}$ BM (iii) $\sqrt{3}$ BM (iv) $\sqrt{24}$ BM (v) $\sqrt{15}$ BM Choose the correct option:

Iron carbonyl, \ce{Fe(CO)5}, is:

The type of isomerism shown by the complex \ce{[CoCl2(en)2]} is:

The geometry and magnetic behaviour of the complex \ce{[Ni(CO)4]} are:

What is the correct electronic configuration of the central atom in $\ce{K4[Fe(CN)6]}$ based on crystal field theory?

Aluminium chloride in acidified aqueous solution forms a complex 'A', in which the hybridisation state of Al is 'B'. What are 'A' and 'B', respectively?

The Crystal Field Stabilisation Energy (CFSE) for $\ce{[CoCl6]^4-}$ is $18000\ \text{cm}^{-1}$. The CFSE for $\ce{[CoCl4]^2-}$ will be:

Which of the following is the correct order of increasing field strength of ligand to form coordination compound?

The calculated spin only magnetic moment of $\ce{Cr^2+}$ ion is:

Urea reacts with water to form A, which decomposes to form B. B, when passed through \ce{Cu^2+ (aq)}, gives a deep-blue coloured solution C. What is the formula of C?

The calculated 'spin-only' magnetic moment of $\ce{Ti^2+}$ ($3d^2$) is:

Ethylenediaminetetraacetate (EDTA) ion is:

Match List - I with List - II. List-I (a) $\ce{[Fe(CN)6]^3-}$ (b) $\ce{[Fe(H2O)6]^3+}$ (c) $\ce{[Fe(CN)6]^4-}$ (d) $\ce{[Fe(H2O)6]^2+}$ List-II (i) $5.92$ BM (ii) $0$ BM (iii) $4.90$ BM (iv) $1.73$ BM Choose the correct answer from the options given below.

The IUPAC name of the complex \ce{[Ag(H2O)2][Ag(CN)2]} is:

The order of energy absorbed which is responsible for the colour of complexes: (A) $\ce{[Ni(H2O)2(en)2]^2+}$ (B) $\ce{[Ni(H2O)4(en)]^2+}$ (C) $\ce{[Ni(en)3]^2+}$

The homoleptic complex from the following complexes is:

Which complex compound is the most stable?

Which of the following forms a set of a complex and a double salt, respectively?

Type of isomerism exhibited by the compounds \ce{[Cr(H2O)6]Cl3}, \ce{[Cr(H2O)5Cl]Cl2.H2O} and \ce{[Cr(H2O)4Cl2]Cl.2H2O}, and the value of the coordination number (CN) of the central metal ion in all these compounds, respectively, is:

'Spin only' magnetic moment is same for which of the following ions? A. $\ce{Ti^3+}$ B. $\ce{Cr^2+}$ C. $\ce{Mn^2+}$ D. $\ce{Fe^2+}$ E. $\ce{Sc^3+}$ Choose the most appropriate answer from the options given below:

Match List-I with List-II: List-I (Complex) (a) \ce{[Co(NH3)5(NO2)]Cl2} (b) \ce{[Co(NH3)5(SO4)]Br} (c) \ce{[Co(NH3)6][Cr(CN)6]} (d) \ce{[Co(H2O)6]Cl3} List-II (Type of isomerism) (i) Solvate isomerism (ii) Linkage isomerism (iii) Ionization isomerism (iv) Coordination isomerism Choose the correct option:

Given below are two statements: Statement I: Both $\ce{[Co(NH3)6]^3+}$ and $\ce{[CoF6]^3-}$ complexes are octahedral but differ in their magnetic behaviour. Statement II: $\ce{[Co(NH3)6]^3+}$ is diamagnetic whereas $\ce{[CoF6]^3-}$ is paramagnetic. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement I: \ce{[Co(NH3)6]^3+} is a homoleptic complex whereas \ce{[Co(NH3)4Cl2]+} is a heteroleptic complex. Statement II: Complex \ce{[Co(NH3)6]^3+} has one kind of ligands but \ce{[Co(NH3)4Cl2]+} has more than one kind of ligands. In the light of the above statements, choose the correct answer from the options given below:

Out of the following complex compounds, which compound will have the minimum conductance in solution?

Which of the following are paramagnetic? A. \ce{[NiCl4]^2-} B. \ce{Ni(CO)4} C. \ce{[Ni(CN)4]^2-} D. \ce{[Ni(H2O)6]^2+} E. \ce{Ni(PPh3)4}

The correct order of the wavelength of light absorbed by the following complexes is: A. $\ce{[Co(NH3)6]^3+}$ B. $\ce{[Co(CN)6]^3-}$ C. $\ce{[Cu(H2O)4]^2+}$ D. $\ce{[Ti(H2O)6]^3+}$

The complex which has facial and meridional isomers is: (py = pyridine, en = $\ce{H2N-CH2-CH2-NH2}$)

Given two statements — Statement-I: $\ce{[Fe(ox)3]^{3-}}$ is chiral. Statement-II: $trans\text{-}\ce{[Cr(H2O)2(ox)2]^-}$ is chiral. (oxH$_2$ = HOOC–COOH). Choose the most appropriate answer:

According to crystal field theory, the correct order of ligands with respect to their decreasing field strength is:

A $1:3$ electrolyte in aqueous solution is:

Match List-I (Complex) with List-II (Type of isomerism): List-I (a) \ce{[Pt(NH3)2Cl2]} (b) \ce{[Co(en)3]^3+} (c) \ce{[Co(NH3)5(NO2)]Cl2} (d) \ce{[Cr(H2O)6]Cl3} List-II (i) Optical (ii) Solvate (iii) Geometrical (iv) Linkage Choose the correct option:

Which one of the following is an ambidentate ligand?

Match List-I (Complex/ion) with List-II (Shape/geometry): List-I (a) \ce{[PtCl2(NH3)2]} (b) \ce{[Co(NH3)6]Cl3} (c) \ce{[NiCl4]^2-} (d) \ce{[Fe(CO)5]} List-II (i) Octahedral (ii) Trigonal bipyramidal (iii) Square planar (iv) Tetrahedral Choose the correct option:

Among the species below, the spin-only magnetic moment is highest for: (Atomic numbers: Ti $=22$, Mn $=25$, Fe $=26$, Co $=27$)

The formula of tetraammineaquachloridocobalt(III) chloride is:

In potash alum, the ratio of $\ce{K+}$ and $\ce{SO4^{2-}}$ ions is: