Coordination Compounds

318 questions · Chemistry · JEE Main

Coordination Compounds

318 questions · Chemistry · JEE Main

A transition metal (M) among $Mn, Cr, Co$ and Fe has the highest standard electrode potential $(M^{3 +} / M^{2 +})$ . It forms a metal complex of the type $[M (CN)_{6}]^{4 -}$ …2025 · 2 Apr · Shift 1 · Q25 · Numerical
Given below are two statements : Statement (I) : In octahedral complexes, when $Δ_{0} P$ low spin complexes are formed. Statement (II) : In tetrahedral complexes because of$\Delta_t In the light of the above statements, choose the most…2025 · 2 Apr · Shift 1 · Q9 · MCQ
The type of hybridization and the magnetic property of $[MnCl_{6}]^{3 -}$ are,2025 · 2 Apr · Shift 2 · Q17 · MCQ
The d-orbital electronic configuration of the complex among $[Co (en)_{3}]^{3 +}, [CoF_{6}]^{3 -}$ , $[Mn (H_{2} O)_{6}]^{2 +}$ and $[Zn (H_{2} O)_{6}]^{2 +}$ …2025 · 2 Apr · Shift 2 · Q19 · MCQ
The spin-only magnetic moment value of $M^{n +}$ ion formed among $Ni, Zn, Mn$ and Cu that has the least enthalpy of atomisation is . (in nearest integer) Here n is…2025 · 2 Apr · Shift 2 · Q23 · Numerical
The correct order of the complexes $[Co (NH_{3})_{5} (H_{2} O)]^{3 +} (A), [Co (NH_{3})_{6}]^{3 +} (B), [Co (CN)_{6}]^{3 -} (C)$ …2025 · 3 Apr · Shift 1 · Q1 · MCQ
The number of optical isomers exhibited by the iron complex $(A)$ obtained from the following reaction is . $FeCl_{3} + KOH + H_{2} C_{2} O_{4} \to A$ 2025 · 3 Apr · Shift 1 · Q24 · Numerical
$Match the LIST-I with LIST-II$ $Choose the correct answer from the options given below:$ Includes table2025 · 3 Apr · Shift 1 · Q4 · MCQ
Identify the diamagnetic octahedral complex ions from below ; A. $[Mn (CN)_{6}]^{3 -}$ B. $[Co (NH_{3})_{6}]^{3 +}$ C. $[Fe (CN)_{6}]^{4 -}$ D. $[Co (H_{2} O)_{3} F_{3}]$ …2025 · 3 Apr · Shift 2 · Q9 · MCQ
Which one of the following complexes will have $Δ_{o} = 0$ and $μ = 5.96$ B.M?2025 · 4 Apr · Shift 1 · Q11 · MCQ
Number of stereoisomers possible for the complexes, $[CrCl_{3} (py)_{3}]$ and $[CrCl_{2} (ox)_{2}]^{3 -}$ are respectively $(p y =$ pyridine, $o x =$ oxalate $)$ 2025 · 4 Apr · Shift 1 · Q14 · MCQ
' $X$ ' is the number of electrons in $t_{2 g}$ orbitals of the most stable complex ion among $[Fe (NH_{3})_{6}]^{3 +}, [FeCl_{6}]^{3 -}, [Fe (C_{2} O_{4})_{3}]^{3 -}$ …2025 · 4 Apr · Shift 2 · Q13 · MCQ
The correct order of $[FeF_{6}]^{3 -}, [CoF_{6}]^{3 -}, [Ni (CO)_{4}]$ and $[Ni (CN)_{4}]^{2 -}$ complex species based on the number of unpaired electrons…2025 · 4 Apr · Shift 2 · Q17 · MCQ
A metal complex with a formula $MCl_{4} \cdot 3 NH_{3}$ is involved in $sp^{3} d^{2}$ hybridisation. It upon reaction with excess of $AgNO_{3}$ solution gives ' $x$ ' moles of AgCl . Consider ' $x$ ' is…2025 · 4 Apr · Shift 2 · Q23 · Numerical
An octahedral complex having molecular composition $Co \cdot 5 NH_{3} \cdot Cl^{2} . SO_{4}$ has two isomers A and B. The solution of A gives a white precipitate with $AgNO_{3}$ solution and the…2025 · 7 Apr · Shift 1 · Q19 · MCQ
The number of paramagnetic complexes among $[FeF_{6}]^{3 -}, [Fe (CN)_{6}]^{3 -}, [Mn (CN)_{6}]^{3 -}$ , $[Co (C_{2} O_{4})_{3}]^{3 -}, [MnCl_{6}]^{3 -}$ …2025 · 7 Apr · Shift 1 · Q22 · Numerical
Match List - I with List - II. Choose the correct answer from the options given below : Includes table2025 · 7 Apr · Shift 2 · Q1 · MCQ
The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively : $[F e (C N)_{6}]^{3 -}$ , $[F e F_{6}]^{3 -}$ , $[C o F_{6}]^{3 -}$ , $[M n (C N)_{6}]^{3 -}$ 2025 · 7 Apr · Shift 2 · Q15 · MCQ
'X' is the number of acidic oxides among $V O_{2}$ , $V_{2} O_{3}$ , $C r O_{3}$ , $V_{2} O_{5}$ and $M n_{2} O_{7}$ . The primary valency of cobalt in $[C o (H_{2} N C H_{2} C H_{2} N H_{2})_{3}]_{2} (S O_{4})_{3}$ is Y. The value of X + Y is .2025 · 7 Apr · Shift 2 · Q19 · MCQ
The number of paramagnetic metal complex species among $[Co (NH_{3})_{6}]^{3 +}, [Co (C_{2} O_{4})_{3}]^{3 -}$ , $[MnCl_{6}]^{3 -}, [Mn (CN)_{6}]^{3 -}, [CoF_{6}]^{3 -}, [Fe (CN)_{6}]^{3 -}$ …2025 · 7 Apr · Shift 2 · Q23 · Numerical
The number of species from the following that are involved in sp3d2 hybridization is : $[C o (N H_{3})_{6}]^{3 +}$ , $S F_{6}$ , $[C r F_{6}]^{3 -}$ , $[C o F_{6}]^{3 -}$ , $[M n (C N)_{6}]^{3 -}$ , and $[M n C l_{6}]^{3 -}$ 2025 · 8 Apr · Shift 2 · Q10 · MCQ
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…2025 · 8 Apr · Shift 2 · Q15 · MCQ
Match the LIST-I with LIST-II Choose the correct answer from the options given below: Includes table2025 · 8 Apr · Shift 2 · Q2 · MCQ
In which of the following complexes the CFSE, $Δ_{o}$ will be equal to zero?2025 · 22 Jan · Shift 1 · Q16 · MCQ
From the magnetic behaviour of $[NiCl_{4}]^{2 -}$ (paramagnetic) and $[Ni (CO)_{4}]$ (diamagnetic), choose the correct geometry and oxidation state.2025 · 22 Jan · Shift 1 · Q4 · MCQ
Identify the homoleptic complex(es) that is/are low spin. (A) $[Fe (CN)_{5} NO]^{2 -}$ (B) $[CoF_{6}]^{3 -}$ (C) $[Fe (CN)_{6}]^{4 -}$ (D) $[Co (NH_{3})_{6}]^{3 +}$ …2025 · 22 Jan · Shift 2 · Q13 · MCQ
The complex of $Ni^{2 +}$ ion and dimethyl glyoxime contains number of Hydrogen (H) atoms.2025 · 22 Jan · Shift 2 · Q22 · Numerical
The correct order of the following complexes in terms of their crystal field stabilization energies is :2025 · 22 Jan · Shift 2 · Q4 · MCQ
The d-electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is:2025 · 23 Jan · Shift 1 · Q17 · MCQ
The complex that shows Facial - Meridional isomerism is :2025 · 23 Jan · Shift 1 · Q18 · MCQ
$CrCl_{3} \cdot xNH_{3}$ can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point of $0.55 8^{\circ} C$ . Assuming $100%$ ionisation of this complex and coordination…2025 · 23 Jan · Shift 1 · Q6 · MCQ
Identify the coordination complexes in which the central metal ion has $d^{4}$ configuration. (A) $[FeO_{4}]^{2 -}$ (B) $[Mn (CN)_{6}]^{3 -}$ (C) $[Fe (CN)_{6}]^{3 -}$ … Includes diagram2025 · 23 Jan · Shift 2 · Q12 · MCQ
One mole of the octahedral complex compound $Co (NH_{3})_{5} Cl_{3}$ gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of $AgNO_{3}$ solution to yield two…2025 · 24 Jan · Shift 1 · Q12 · MCQ
The conditions and consequence that favours the $t_{2 g}^{3} e_{g}^{1}$ configuration in a metal complex are :2025 · 24 Jan · Shift 2 · Q13 · MCQ
When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:2025 · 24 Jan · Shift 2 · Q18 · MCQ
The spin only magnetic moment ( $μ$ ) value (B.M.) of the compound with strongest oxidising power among $Mn_{2} O_{3}, TiO$ and VO is B.M. (Nearest integer).2025 · 28 Jan · Shift 2 · Q21 · Numerical
Total number of molecules/species from following which will be paramagnetic is . $O_{2}, O_{2}^{+}, O_{2}^{-}, NO, NO_{2}, CO, K_{2} [NiCl_{4}], [Co (NH_{3})_{6}] Cl_{3}, K_{2} [Ni (CN)_{4}]$ …2025 · 28 Jan · Shift 2 · Q22 · Numerical
Match List - I with List - II. Choose the correct answer from the options given below: Includes table2025 · 28 Jan · Shift 2 · Q4 · MCQ
Match List - I with List - II. Choose the correct answer from the options given below : Includes table2025 · 29 Jan · Shift 1 · Q14 · MCQ
The correct increasing order of stability of the complexes based on $Δ_{0}$ value is : I. $[Mn (CN)_{6}]^{3 -}$ II. $[Co (CN)_{6}]^{4 -}$ III. $[Fe (CN)_{6}]^{4 -}$ IV. $[Fe (CN)_{6}]^{3 -}$ 2025 · 29 Jan · Shift 1 · Q4 · MCQ
The calculated spin-only magnetic moments of $K_{3} [F e (O H)_{6}]$ and $K_{4} [F e (O H)_{6}]$ respectively are :2025 · 29 Jan · Shift 2 · Q11 · MCQ
Consider the following low-spin complexes $K_{3} [Co (NO_{2})_{6}], K_{4} [Fe (CN)_{6}], K_{3} [Fe (CN)_{6}], Cu_{2} [Fe (CN)_{6}] and Zn_{2} [Fe (CN)_{6}]$ …2025 · 29 Jan · Shift 2 · Q22 · Numerical
Identify the homoleptic complexes with odd number of $d$ electrons in the central metal : (A) $[FeO_{4}]^{2 -}$ (B) $[Fe (CN)_{6}]^{3 -}$ (C) $\left[\mathrm{Fe}(\mathrm{CN})_5…2025 · 29 Jan · Shift 2 · Q8 · MCQ
Given below are two statements : Statement (I) : A solution of $[Ni (H_{2} O)_{6}]^{2 +}$ is green in colour. Statement (II) : A solution of $[Ni (CN)_{4}]^{2 -}$ is…2024 · 1 Feb · Shift 1 · Q10 · MCQ
Which of the following complex is homoleptic?2024 · 1 Feb · Shift 1 · Q4 · MCQ
Which of the following compounds show colour due to d-d transition?2024 · 1 Feb · Shift 2 · Q19 · MCQ
$[Co (NH_{3})_{6}]^{3 +}$ and $[CoF_{6}]^{3 -}$ are respectively known as :2024 · 1 Feb · Shift 2 · Q5 · MCQ
Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six-membered covalent chelate when treated with $NiCl_{2}$ solution in presence of $NH_{4} OH$ . Statement (II) : Prussian blue precipitate…2024 · 1 Feb · Shift 2 · Q9 · MCQ
Number of complexes from the following with even number of unpaired " $d$ " electrons is $[V (H_{2} O)_{6}]^{3 +}, [Cr (H_{2} O)_{6}]^{2 +}, [Fe (H_{2} O)_{6}]^{3 +}, [Ni (H_{2} O)_{6}]^{3 +}, [Cu (H_{2} O)_{6}]^{2 +}$ …2024 · 4 Apr · Shift 1 · Q1 · MCQ
The correct sequence of ligands in the order of decreasing field strength is :2024 · 4 Apr · Shift 1 · Q12 · MCQ
A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of $3.86 BM$ . The atomic number of the metal is2024 · 4 Apr · Shift 2 · Q15 · MCQ
If an iron (III) complex with the formula $[Fe (NH_{3})_{x} (CN)_{y}]^{-}$ has no electron in its $e_{g}$ orbital, then the value of $x + y$ is2024 · 4 Apr · Shift 2 · Q3 · MCQ
The number of unpaired d-electrons in $[Co (H_{2} O)_{6}]^{3 +}$ is .2024 · 4 Apr · Shift 2 · Q4 · MCQ
The correct order of ligands arranged in increasing field strength.2024 · 5 Apr · Shift 1 · Q12 · MCQ
Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, $Cr = 24, Mn = 25, Fe = 26, Co = 27$ ]2024 · 5 Apr · Shift 1 · Q14 · MCQ
The spin-only magnetic moment value of the ion among $Ti^{2 +}, V^{2 +}, Co^{3 +}$ and $Cr^{2 +}$ , that acts as strong oxidising agent in aqueous solution is BM (Near integer).…2024 · 5 Apr · Shift 1 · Q21 · Numerical
The number of complexes from the following with no electrons in the $t_{2}$ orbital is . $TiCl_{4}, [MnO_{4}]^{-}, [FeO_{4}]^{2 -}, [FeCl_{4}]^{-}, [CoCl_{4}]^{2 -}$ …2024 · 5 Apr · Shift 2 · Q1 · MCQ
The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and $M$ is metal) involves $sp^{3}$ hybridization. The number of geometrical isomers exhibited by the complex is :2024 · 5 Apr · Shift 2 · Q18 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 6 Apr · Shift 1 · Q19 · MCQ
The difference in the 'spin-only' magnetic moment values of $KMnO_{4}$ and the manganese product formed during titration of $KMnO_{4}$ against oxalic acid in acidic medium is $BM$ . (nearest…2024 · 6 Apr · Shift 1 · Q26 · Numerical
Consider the following complexes (A) $[CoCl (NH_{3})_{5}]^{2 +}$ , (B) $[Co (CN)_{6}]^{3 -}$ , (C) $[Co (NH_{3})_{5} (H_{2} O)]^{3 +}$ …2024 · 6 Apr · Shift 1 · Q6 · MCQ
Given below are two statements : Statement I : $PF_{5}$ and $BrF_{5}$ both exhibit $sp^{3} d$ hybridisation. Statement II : Both $SF_{6}$ and $[Co (NH_{3})_{6}]^{3 +}$ exhibit $sp^{3} d^{2}$ …2024 · 6 Apr · Shift 2 · Q10 · MCQ
Match List I with List II. Choose the correct answer from the options given below : Includes table2024 · 6 Apr · Shift 2 · Q11 · MCQ
The correct IUPAC name of $[PtBr_{2} (PMe_{3})_{2}]$ is :2024 · 6 Apr · Shift 2 · Q18 · MCQ
Number of Complexes with even number of electrons in $t_{2g}$ orbitals is - $[Fe (H_{2} O)_{6}]^{2 +}, [Co (H_{2} O)_{6}]^{2 +}, [Co (H_{2} O)_{6}]^{3 +}, [Cu (H_{2} O)_{6}]^{2 +}, [Cr (H_{2} O)_{6}]^{2 +}$ …2024 · 8 Apr · Shift 1 · Q11 · MCQ
An octahedral complex with the formula $CoCl_{3} \cdot nNH_{3}$ upon reaction with excess of $AgNO_{3}$ solution gives 2 moles of $AgCl$ . Consider the oxidation state of $Co$ in the complex is ' $x$ '.…2024 · 8 Apr · Shift 1 · Q13 · MCQ
Given below are two statements: Statement I: $N (CH_{3})_{3}$ and $P (CH_{3})_{3}$ can act as ligands to form transition metal complexes. Statement II: As N and P are from same group, the…2024 · 8 Apr · Shift 1 · Q18 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 8 Apr · Shift 1 · Q20 · MCQ
The 'spin only' magnetic moment value of $MO_{4}^{2 -}$ is BM. (Where M is a metal having least metallic radii. among $Sc, Ti, V, Cr, Mn$ and $Zn$ …2024 · 8 Apr · Shift 1 · Q29 · Numerical
Total number of unpaired electrons in the complex ions $[Co (NH_{3})_{6}]^{3 +}$ and $[NiCl_{4}]^{2 -}$ is .2024 · 8 Apr · Shift 2 · Q23 · Numerical
Match List I with List II Choose the correct answer from the options given below : Includes table2024 · 8 Apr · Shift 2 · Q4 · MCQ
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The total number of geometrical isomers shown by $[Co (en)_{2} Cl_{2}]^{+}$ complex ion is…2024 · 9 Apr · Shift 1 · Q15 · MCQ
Number of ambidentate ligands among the following is . $NO_{2}^{-}, SCN^{-}, C_{2} O_{4}^{2 -}, NH_{3}, CN^{-}, SO_{4}^{2 -}, H_{2} O .$ 2024 · 9 Apr · Shift 1 · Q23 · Numerical
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 9 Apr · Shift 2 · Q15 · MCQ
The coordination environment of $Ca^{2 +}$ ion in its complex with $EDTA^{4 -}$ is :2024 · 9 Apr · Shift 2 · Q19 · MCQ
Consider the following test for a group-IV cation. $M^{2 +} + H_{2} S \to A (Black precipitate)+ byproduct A + aqua regia \to B + NOCl + S + H_{2} OB + KNO_{2} + CH_{3} COOH \to C + byproduct$ …2024 · 9 Apr · Shift 2 · Q28 · Numerical
Yellow compound of lead chromate gets dissolved on treatment with hot $NaOH$ solution. The product of lead formed is a :2024 · 27 Jan · Shift 1 · Q15 · MCQ
Consider the following complex ions $P = [FeF_{6}]^{3 -} Q = [V (H_{2} O)_{6}]^{2 +} R = [Fe (H_{2} O)_{6}]^{2 +}$ …2024 · 27 Jan · Shift 1 · Q8 · MCQ
Identity the incorrect pair from the following :2024 · 27 Jan · Shift 2 · Q1 · MCQ
The Spin only magnetic moment value of square planar complex $[Pt (NH_{3})_{2} Cl (NH_{2} CH_{3})] Cl$ is B.M. (Nearest integer)…2024 · 27 Jan · Shift 2 · Q22 · Numerical
Identify from the following species in which $d^{2} sp^{3}$ hybridization is shown by central atom :2024 · 27 Jan · Shift 2 · Q8 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 29 Jan · Shift 1 · Q12 · MCQ
In which one of the following metal carbonyls, $CO$ forms a bridge between metal atoms?2024 · 29 Jan · Shift 1 · Q16 · MCQ
A reagent which gives brilliant red precipitate with Nickel ions in basic medium is2024 · 29 Jan · Shift 2 · Q16 · MCQ
Choose the correct statements from the following : (A) Ethane-1, 2-diamine is a chelating ligand. (B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite. (C) Cyanide ion is used as ligand for leaching…2024 · 30 Jan · Shift 1 · Q16 · MCQ
The coordination geometry around the manganese in decacarbonyldimanganese $(0)$ is2024 · 30 Jan · Shift 2 · Q18 · MCQ
Number of complexes which show optical isomerism among the following is . $cis- [Cr (ox)_{2} Cl_{2}]^{3 -}, [Co (en)_{3}]^{3 +}, cis- [Pt (en)_{2} Cl_{2}]^{2 +}, cis- [Co (en)_{2} Cl_{2}]^{+}, trans- [Pt (en)_{2} Cl_{2}]^{2 +}, trans- [Cr (ox)_{2} Cl_{2}]^{3 -}$ …2024 · 30 Jan · Shift 2 · Q28 · Numerical
The 'Spin only' Magnetic moment for $[Ni (NH_{3})_{6}]^{2 +}$ is $\times 1 0^{- 1} BM$ . (given $=$ Atomic number of $Ni : 28$ )2024 · 31 Jan · Shift 1 · Q25 · Numerical
The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds. C.…2024 · 31 Jan · Shift 1 · Q7 · MCQ
Select the option with correct property -2024 · 31 Jan · Shift 2 · Q11 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 31 Jan · Shift 2 · Q18 · MCQ
Which of the following complex will show largest splitting of d-orbitals?2023 · 1 Feb · Shift 1 · Q1 · MCQ
Which of the following are the example of double salt? A. $FeSO_{4} \cdot (NH_{4})_{2} SO_{4} \cdot 6 H_{2} O$ B. $CuSO_{4} \cdot 4 NH_{3} \cdot H_{2} O$ …2023 · 1 Feb · Shift 1 · Q2 · MCQ
A solution of $FeC l_{3}$ when treated with $K_{4} [Fe (CN)_{6}]$ gives a prussium blue precipitate due to the formation of :2023 · 1 Feb · Shift 1 · Q9 · MCQ
The complex cation which has two isomers is :2023 · 1 Feb · Shift 2 · Q13 · MCQ
The spin only magnetic moment of $[Mn (H_{2} O)_{6}]^{2 +}$ complexes is B.M. (Nearest integer) (Given : Atomic no. of Mn is 25)2023 · 1 Feb · Shift 2 · Q22 · Numerical
Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason $R$ . Assertion A: The spin only magnetic moment value for $[Fe (CN)_{6}]^{3 -}$ is $1.74 BM$ …2023 · 6 Apr · Shift 1 · Q1 · MCQ
Number of ambidentate ligands in a representative metal complex $[M (en) (SCN)_{4}]$ is . [en = ethylenediamine]2023 · 6 Apr · Shift 1 · Q20 · Numerical
The IUPAC name of $K_{3} [Co (C_{2} O_{4})_{3}]$ is:-2023 · 6 Apr · Shift 2 · Q11 · MCQ
Which of the following complex is octahedral, diamagnetic and the most stable?2023 · 8 Apr · Shift 1 · Q2 · MCQ
The correct order of spin only magnetic moments for the following complex ions is2023 · 8 Apr · Shift 1 · Q4 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2023 · 8 Apr · Shift 2 · Q1 · MCQ
The observed magnetic moment of the complex $[Mn (\underline{N} C S)_{6})]^{x^{-}}$ is $6.06 BM$ . The numerical value of $x$ is .2023 · 8 Apr · Shift 2 · Q15 · Numerical
In potassium ferrocyanide, there are pairs of electrons in the $t_{2 g}$ set of orbitals.2023 · 10 Apr · Shift 1 · Q15 · Numerical
The octahedral diamagnetic low spin complex among the following is :2023 · 10 Apr · Shift 1 · Q7 · MCQ
For a metal ion, the calculated magnetic moment is $4.90 BM$ . This metal ion has number of unpaired electrons.2023 · 10 Apr · Shift 2 · Q14 · Numerical
The correct order of the number of unpaired electrons in the given complexes is A. $[Fe (CN)_{6}]^{3 -}$ B. $[Fe F_{6}]^{3 -}$ C. $[CoF_{6}]^{3 -}$ D. $[Cr (oxalate)_{3}]^{3 -}$ …2023 · 10 Apr · Shift 2 · Q6 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2023 · 10 Apr · Shift 2 · Q9 · MCQ
The set which does not have ambidentate ligand(s) is :2023 · 11 Apr · Shift 1 · Q12 · MCQ
Which of the following complex has a possibility to exist as meridional isomer?2023 · 11 Apr · Shift 1 · Q14 · MCQ
The ratio of spin-only magnetic moment values $μ_{eff} [Cr (CN)_{6}]^{3 -} / μ_{eff} [Cr (H_{2} O)_{6}]^{3 +}$ is .2023 · 11 Apr · Shift 1 · Q18 · Numerical
The complex that dissolves in water is :2023 · 11 Apr · Shift 1 · Q3 · MCQ
The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of $Fe$ in $[Fe (H_{2} O)_{6}]^{3 +}$ and $[Fe (CN)_{6}]^{3 -}$ …2023 · 11 Apr · Shift 2 · Q11 · MCQ
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : $[CoCl (NH_{3})_{5}]^{2 +}$ absorbs at lower wavelength of light with respect to $[Co (NH_{3})_{5} (H_{2} O)]^{3 +}$ …2023 · 11 Apr · Shift 2 · Q4 · MCQ
If $Ni^{2 +}$ is replaced by $Pt^{2 +}$ in the complex $[NiCl_{2} Br_{2}]^{2 -}$ , which of the following properties are expected to get changed ? A. Geometry B. Geometrical isomerism C. Optical…2023 · 11 Apr · Shift 2 · Q5 · MCQ
Match List I with List II Choose the correct answer from the options given below : Includes table2023 · 11 Apr · Shift 2 · Q7 · MCQ
Match List I with List II Choose the correct answer from the options given below: Includes table2023 · 12 Apr · Shift 1 · Q2 · MCQ
The mismatched combinations are A. Chlorophyll - $C o$ B. Water hardness - $E D T A$ C. Photography $- [Ag (CN)_{2}]^{-}$ D. Wilkinson catalyst $- [(Ph_{3} P)_{3} RhCl]$ …2023 · 13 Apr · Shift 1 · Q5 · MCQ
The total number of stereoisomers for the complex $[Cr (o x)_{2} ClBr]^{3 -}$ (where $o x =$ oxalate) is :2023 · 13 Apr · Shift 2 · Q4 · MCQ
Which of the following complexes will exhibit maximum attraction to an applied magnetic field?2023 · 13 Apr · Shift 2 · Q7 · MCQ
The complex with highest magnitude of crystal field splitting energy $(Δ_{0})$ is :2023 · 15 Apr · Shift 1 · Q2 · MCQ
The homoleptic and octahedral complex of $Co^{2 +}$ and $H_{2} O$ has unpaired electron(s) in the $t_{2 g}$ set of orbitals.2023 · 15 Apr · Shift 1 · Q22 · Numerical
The primary and secondary valencies of cobalt respectively in $[Co (N H_{3})_{5} Cl] C l_{2}$ are :2023 · 24 Jan · Shift 1 · Q1 · MCQ
The d-electronic configuration of $[CoC l_{4}]^{2 -}$ in tetrahedral crystal field in $e^{m} t_{2}^{n}$ . Sum of "m" and "number of unpaired electrons" is 2023 · 24 Jan · Shift 1 · Q22 · Numerical
The hybridization and magnetic behaviour of cobalt ion in $[Co (N H_{3})_{6}]^{3 +}$ complex, respectively is :2023 · 24 Jan · Shift 2 · Q10 · MCQ
Which of the following cannot be explained by crystal field theory?2023 · 24 Jan · Shift 2 · Q13 · MCQ
The number of paramagnetic species from the following is . $[Ni (CN)_{4}]^{2 -}, [Ni (CO)_{4}], [NiC l_{4}]^{2 -} [Fe (CN)_{6}]^{4 -}, [Cu (N H_{3})_{4}]^{2 +} [Fe (CN)_{6}]^{3 -} and [Fe (H_{2} O)_{6}]^{2 +}$ …2023 · 25 Jan · Shift 1 · Q21 · Numerical
Match List I with List II Choose the correct answer from the options given below : Includes table2023 · 25 Jan · Shift 2 · Q10 · MCQ
Total number of moles of AgCl precipitated on addition of excess of AgNO $_{3}$ to one mole each of the following complexes $[Co (N H_{3})_{4} C l_{2}] Cl, [Ni (H_{2} O)_{6}] C l_{2}, [Pt (N H_{3})_{2} C l_{2}]$ and $[Pd (N H_{3})_{4}] C l_{2}$ is …2023 · 25 Jan · Shift 2 · Q19 · Numerical
Chiral complex from the following is : Here en = ethylene diamine2023 · 29 Jan · Shift 1 · Q10 · MCQ
The sum of bridging carbonyls in $W (CO)_{6}$ and $M n_{2} (CO)_{10}$ is .2023 · 29 Jan · Shift 1 · Q20 · Numerical
Correct order of spin only magnetic moment of the following complex ions is : (Given At.no. Fe : 26, Co : 27)2023 · 29 Jan · Shift 2 · Q8 · MCQ
To inhibit the growth of tumours, identify the compounds used from the following : A. EDTA B. Coordination Compounds of Pt C. D - Penicillamine D. Cis - Platin Choose the correct answer from the option given below :2023 · 30 Jan · Shift 1 · Q1 · MCQ
Which of the following is correct order of ligand field strength?2023 · 30 Jan · Shift 1 · Q6 · MCQ
Match List I with List II: Includes table2023 · 30 Jan · Shift 2 · Q4 · MCQ
The $Cl - Co - Cl$ bond angle values in a fac- $[Co (NH_{3})_{3} Cl_{3}]$ complex is/are :2023 · 30 Jan · Shift 2 · Q5 · MCQ
Cobalt chloride when dissolved in water forms pink colored complex $\underline{X}$ which has octahedral geometry. This solution on treating with conc $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ …2023 · 31 Jan · Shift 1 · Q13 · MCQ
If the CFSE of $[Ti (H_{2} O)_{6}]^{3 +}$ is $- 96.0 kJ / mol$ , this complex will absorb maximum at wavelength $nm$ . (nearest integer) Assume…2023 · 31 Jan · Shift 2 · Q21 · Numerical
In the cobalt-carbonyl complex : $[C o_{2} (C O)_{8}]$ , number of Co-Co bonds is "X" and terminal $C O$ ligands is "Y". X + Y = .2022 · 24 Jun · Shift 1 · Q18 · Numerical
Match List - I with List - II : Choose the most appropriate answer from the options given below : Includes table2022 · 24 Jun · Shift 1 · Q3 · MCQ
Transition metal complex with highest value of crystal field splitting ( $Δ$ 0) will be :2022 · 24 Jun · Shift 2 · Q8 · MCQ
Consider the following metal complexes : $[Co (NH_{3})_{6}]^{3 +} [CoCl (NH_{3})_{5}]^{2 +} [Co (CN)_{6}]^{3 -} [Co (NH_{3})_{5} (H_{2} O)]^{3 +}$ …2022 · 25 Jul · Shift 1 · Q16 · Numerical
The correct order of energy of absorption for the following metal complexes is : A : $[N i (e n)_{3}]^{2 +}$ , B : $[N i (N H_{3})_{6}]^{2 +}$ , C : $[N i (H_{2} O)_{6}]^{2 +}$ 2022 · 25 Jul · Shift 2 · Q6 · MCQ
If $[C u (H_{2} O)_{4}]^{2 +}$ absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field splitting energy for $[C u (H_{2} O)_{6}]^{2 +}$ will be $\times$ 10 $-$ 21 J. [Nearest Integer]…2022 · 25 Jun · Shift 1 · Q22 · Numerical
Amongst $F e C l_{3} .3 H_{2} O$ , $K_{3} [F e (C N)_{6}]$ and $[C o (N H_{3})_{6}] C l_{3}$ , the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is B.M. [nearest integer]2022 · 25 Jun · Shift 2 · Q20 · Numerical
The difference between spin only magnetic moment values of $[Co (H_{2} O)_{6}] Cl_{2}$ and $[Cr (H_{2} O)_{6}] Cl_{3}$ is …2022 · 26 Jul · Shift 1 · Q23 · Numerical
The metal complex that is diamagnetic is (Atomic number: $Fe, 26; Cu, 29)$ 2022 · 26 Jul · Shift 2 · Q5 · MCQ
Which statement is not true with respect to nitrate ion test?2022 · 26 Jun · Shift 1 · Q11 · MCQ
The spin-only magnetic moment value of an octahedral complex among $C o C l_{3} .4 N H_{3}$ , $N i C l_{2} .6 H_{2} O$ and $P tC l_{4} .2 H C l$ , which upon reaction with excess of $A g N O_{3}$ gives 2 moles of $A g C l$ is B.M. (Nearest integer)2022 · 26 Jun · Shift 1 · Q17 · Numerical
Reaction of $[C o (H_{2} O)_{6}]^{2 +}$ with excess ammonia and in the presence of $o x y g e n$ results into a diamagnetic product. Number of electrons present in t2g-orbitals of the product is .2022 · 26 Jun · Shift 2 · Q23 · Numerical
The conductivity of a solution of complex with formula $CoCl_{3} (NH_{3})_{4}$ corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is .2022 · 27 Jul · Shift 1 · Q20 · Numerical
$Fe^{3 +}$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :2022 · 27 Jul · Shift 2 · Q14 · MCQ
Low oxidation state of metals in their complexes are common when ligands :2022 · 27 Jul · Shift 2 · Q7 · MCQ
Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is B.M. (Nearest integer)2022 · 27 Jun · Shift 1 · Q17 · Numerical
Which of the following will have maximum stabilization due to crystal field?2022 · 27 Jun · Shift 1 · Q5 · MCQ
Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : Mn = 25; Fe = 26) A. $[F e F_{6}]^{3 -}$ B. $[F e (C N)_{6}]^{3 -}$ C. $[M n C l_{6}]^{3 -}$ (high spin) D. $[M n (C N)_{6}]^{3 -}$ Choose the correct…2022 · 27 Jun · Shift 2 · Q7 · MCQ
Total number of relatively more stable isomer(s) possible for octahedral complex $[Cu (en)_{2} (SCN)_{2}]$ will be .2022 · 28 Jul · Shift 1 · Q21 · Numerical
Match List I with List II Choose the correct answer from the options given below : Includes table2022 · 28 Jul · Shift 2 · Q5 · MCQ
Number of complexes which will exhibit synergic bonding amongst, $[C r (C O)_{6}]$ , $[M n (C O)_{5}]$ and $[M n_{2} (C O)_{10}]$ is .2022 · 28 Jun · Shift 1 · Q22 · Numerical
Given below are two statements : Statement I : $[N i (C N)_{4}]^{2 -}$ is square planar and diamagnetic complex, with dsp2 hybridization for Ni but $[N i (C O)_{4}]$ is tetrahedral, paramagnetic and with sp3-hybridication for Ni. Statement II : $[N i C l_{4}]^{2 -}$ …2022 · 28 Jun · Shift 1 · Q4 · MCQ
$[F e (C N)_{6}]^{4 -} [F e (C N)_{6}]^{3 -} [T i (C N)_{6}]^{3 -} [N i (C N)_{4}]^{2 -} [C o (C N)_{6}]^{3 -}$ Among the given complexes, number of paramagnetic complexes is .2022 · 28 Jun · Shift 2 · Q17 · Numerical
(a) $C o C l_{3} .4 N H_{3}$ , (b) $C o C l_{3} .5 N H_{3}$ , (c) $C o C l_{3} .6 N H_{3}$ and (d) $C o C l (N O_{3})_{2} .5 N H_{3}$ . Number of complex(es) which will exist in cis-trans form is/are .2022 · 28 Jun · Shift 2 · Q18 · Numerical
$[Fe (CN)_{6}]^{3 -}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is $(-)$ $Δ_{0}$ . (Nearest…2022 · 29 Jul · Shift 1 · Q24 · Numerical
Sum of oxidation state (magnitude) and coordination number of cobalt in $Na [Co (bpy) Cl_{4}]$ is . Includes diagram2022 · 29 Jul · Shift 2 · Q20 · Numerical
Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum structural distortion? (en - ethylenediamine; $H_{2} N_{-} CH_{2} - CH_{2} - NH_{2}$ …2022 · 29 Jul · Shift 2 · Q8 · MCQ
Given below are two statements. $∙$ Statement I : In $C u S O_{4}$ . 5 $H_{2} O$ , Cu-O bonds are present. $∙$ Statement II : In $C u S O_{4}$ . 5 $H_{2} O$ , ligands coordinating with Cu(II) ion are O-and S-based ligands. In the light of the…2022 · 29 Jun · Shift 2 · Q5 · MCQ
In the following brown complex, the oxidation state of iron is +. $[F e (H_{2} O)_{6}]^{2 +} + N O \to Brown complex [F e (H_{2} O)_{5} (N O)]^{2 +} + H_{2} O$ 2022 · 30 Jun · Shift 1 · Q19 · Numerical
Spin only magnetic moment ( $μ$ s) of $K_{3} [F e (C N)_{6}]$ is B.M. (Nearest integer)2022 · 30 Jun · Shift 1 · Q20 · Numerical
Correct formula of the compound which gives a white precipitate with $B a C l_{2}$ solution, but not with $A g N O_{3}$ solution, is :2022 · 30 Jun · Shift 1 · Q8 · MCQ
The potassium ferrocyanide solution gives a Prussian blue colour, when added to :2021 · 1 Sep · Shift 2 · Q12 · MCQ
The sum of oxidation states of two silver ions in $[A g (N H_{3})_{2}]$ $[A g (C N)_{2}]$ complex is .2021 · 1 Sep · Shift 2 · Q17 · Numerical
The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (Mz+) are $-$ 0.8 $Δ$ 0 and 3.87 BM, respectively. Identify (Mz+) :2021 · 1 Sep · Shift 2 · Q5 · MCQ
The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of $C o C l_{3}$ . 4 $N H_{3}$ is . (Round off to the Nearest Integer).2021 · 16 Mar · Shift 1 · Q14 · Numerical
$[T i (H_{2} O)_{6}]^{3 +}$ absorbs light of wavelength 498 nm during a d $-$ d transition. The octahedral splitting energy for the above complex is $\times$ 10 $-$ 19 J. (Round off to the Nearest Integer). h = 6.626 $\times$ …2021 · 16 Mar · Shift 2 · Q15 · Numerical
Match List - I with List - II : Choose the correct answer from the options given below : Includes table2021 · 17 Mar · Shift 2 · Q10 · MCQ
On complete reaction of $F e C l_{3}$ with oxalic acid in aqueous solution containing $K O H$ , resulted in the formation of product A. The secondary valency of $F e$ in the product A is . (Round off to the Nearest…2021 · 17 Mar · Shift 2 · Q14 · Numerical
The correct structures of trans-[ $N i B r_{2} (P P h_{3})_{2}$ ] and meridonial-[ $C o (N H_{3})_{3} (N O_{2})_{3}$ ], respectively, are2021 · 18 Mar · Shift 1 · Q10 · MCQ
The total number of unpaired electrons present in the complex $K_{3} [C r (o x a l a t e)_{3}]$ is .2021 · 18 Mar · Shift 1 · Q21 · Numerical
The secondary valency and the number of hydrogen bonded water molecule(s) in $C u S O_{4}$ . 5 $H_{2} O$ , respectively, are :2021 · 18 Mar · Shift 2 · Q7 · MCQ
According to the valence bond theory the hybridization of central metal atom is dsp2 for which one of the following compounds?2021 · 20 Jul · Shift 1 · Q1 · MCQ
The spin-only magnetic moment value for the complex $[C o (C N)_{6}]^{4 -}$ is BM. [At. no. of Co = 27]2021 · 20 Jul · Shift 1 · Q15 · Numerical
The correct order of intensity of colors of the compounds is :2021 · 20 Jul · Shift 1 · Q3 · MCQ
An aqueous solution of $N i C l_{2}$ was heated with excess sodium cyanide in presence of strong oxidizing agent to form $[N i (C N)_{6}]^{2 -}$ . The total change in number of unpaired electrons on metal centre is .2021 · 20 Jul · Shift 2 · Q23 · Numerical
Spin only magnetic moment of an octahedral complex of $F e^{2 +}$ in the presence of a strong field ligand in BM is :2021 · 20 Jul · Shift 2 · Q7 · MCQ
Which one of the following species doesn't have a magnetic moment of 1.73 BM, (spin only value)?2021 · 20 Jul · Shift 2 · Q8 · MCQ
The total number of unpaired electrons present in $[C o (N H_{3})_{6}] C l_{2}$ and $[C o (N H_{3})_{6}] C l_{3}$ is :2021 · 22 Jul · Shift 2 · Q15 · Numerical
The calculated magnetic moments (spin only value) for species $[F e C l_{4}]^{2 -}$ , $[C o (C_{2} O_{4})_{3}]^{3 -}$ and $M n O_{4}^{2 -}$ respectively are :2021 · 24 Feb · Shift 2 · Q8 · MCQ
The hybridization and magnetic nature of $[M n (C N)_{6}]^{4 -}$ and $[F e (C N)_{6}]^{3 -}$ , respectively are :2021 · 25 Feb · Shift 1 · Q11 · MCQ
The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is BM.2021 · 25 Feb · Shift 2 · Q16 · Numerical
In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment? (i) $[F e F_{6}]^{3 -}$ (ii) $[C o (N H_{3})_{6}]^{3 +}$ (iii) $[N i C l_{4}]^{2 -}$ (iv) $[C u (N H_{3})_{4}]^{2 +}$ 2021 · 25 Feb · Shift 2 · Q5 · MCQ
Which one of the following species responds to an external magnetic field?2021 · 25 Jul · Shift 1 · Q1 · MCQ
Three moles of $A g C l$ get precipitated when one mole of an octahedral co-ordination compound with empirical formula $C r C l_{3}$ . $3 N H_{3}$ . $3 H_{2} O$ reacts with excess of silver nitrate. The number of chloride ions satisfying the secondary valency…2021 · 25 Jul · Shift 1 · Q16 · Numerical
Which one of the following metal complexes is most stable?2021 · 25 Jul · Shift 2 · Q2 · MCQ
The ratio of number of water molecules in Mohr's salt and potash alum is $\times$ 10 $-$ 1. (Integer answer)2021 · 26 Aug · Shift 1 · Q18 · Numerical
The overall stability constant of the complex ion $[C u (N H_{3})_{4}]^{2 +}$ is 2.1 $\times$ 1013. The overall dissociations constant is y $\times$ 10 $-$ 14. Then y is . (Nearest integer)2021 · 26 Aug · Shift 2 · Q19 · Numerical
Indicate the complex/complex ion which did not show any geometrical isomerism :2021 · 26 Aug · Shift 2 · Q7 · MCQ
Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value. Complexes : $A [C o F_{6}]^{3 -}, B [C o (H_{2} O)_{6}]^{2 +}, C [C o (N H_{3})_{6}]^{3 +} an d D [C o (e n)_{3}]^{3 +}$ …2021 · 26 Aug · Shift 2 · Q8 · MCQ
Number of bridging $C O$ ligands in $[M n_{2} (C O)_{10}]$ is .2021 · 26 Feb · Shift 1 · Q19 · Numerical
The number of stereoisomers possible for $[C o (o x)_{2} (B r) (N H_{3})]^{2 -}$ is . [ox = oxalate]2021 · 26 Feb · Shift 2 · Q23 · Numerical
1 mol of an octahedral metal complex with formula $M C l_{3}$ . 2 $L$ on reaction with excess of $A g N O_{3}$ gives 1 mol of $A g C l$ . The denticity of Ligand $L$ is . (Integer answer)2021 · 27 Aug · Shift 1 · Q17 · Numerical