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Coordination Compounds

JEE Advanced · Chemistry · 55 past questions

Q1 2026 Paper 1

The total number of all possible isomers for the square planar complex with formula K[M(NCS)(NO$_2$)(gly)] is…
Q2 2026 Paper 2

Consider that the coordinating atoms of the ligands in $cis$-[Co(NH$_3$)$_4$Cl$_2$]Cl and…
Q3 2025 Paper 1

The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the…
Q4 2025 Paper 2

During sodium nitroprusside test of sulphide ion in an aqueous solution, one of the ligands coordinated to…
Q5 2025 Paper 2

The sum of the spin only magnetic moment values (in B.M.) of [Mn(Br)$_6$]$^{3-}$ and [Mn(CN)$_6$]$^{3-}$ is…
Q6 2024 Paper 1

Among the following options, select the option in which each complex in Set-I shows geometrical isomerism and…
Q7 2024 Paper 1

Among V(CO)$_6$, Cr(CO)$_5$, Cu(CO)$_3$, Mn(CO)$_5$, Fe(CO)$_5$, [Co(CO)$_3$]$^{3-}$, [Cr(CO)$_4$]$^{4-}$…
Q8 2024 Paper 1

Among the following complexes, the total number of diamagnetic species is ______.…
Q9 2024 Paper 2

Among $[\mathrm{Co(CN)_4}]^{4-}$, $[\mathrm{Co(CO)_3(NO)}]$, $\mathrm{XeF_4}$, $[\mathrm{PCl_4}]^{+}$…
Q10 2024 Paper 2

When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is…
Q11 2024 Paper 2

When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is…
Q12 2023 Paper 1

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the…
Q13 2023 Paper 2

The complex(es), which can exhibit the type of isomerism shown by [Pt(NH$_3$)$_2$Br$_2$], is(are) [en =…
Q14 2022 Paper 1

LIST-I contains metal species and LIST-II contains their properties.…
Q15 2021 Paper 1

The calculated spin only magnetic moments of $[\mathrm{Cr(NH_3)_6}]^{3+}$ and $[\mathrm{CuF_6}]^{3-}$ in BM…
Q16 2021 Paper 1

The total number of possible isomers for [Pt(NH$_3$)$_4$Cl$_2$]Br$_2$ is ___.
Q17 2021 Paper 2

The pair(s) of complexes wherein both exhibit tetrahedral geometry is(are)…
Q18 2021 Paper 2

Paragraph…
Q19 2020 Paper 1

Choose the correct statement(s) among the following…
Q20 2019 Paper 2

Total number of cis N–Mn–Cl bond angles (that is, Mn–N and Mn–Cl bonds in cis positions) present in a…
Q21 2018 Paper 1

The correct statement(s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers…
Q22 2018 Paper 2

The correct option(s) regarding the complex $[\mathrm{Co(en)(NH_3)_3(H_2O)}]^{3+}$ (en =…
Q23 2018 Paper 2

Match each set of hybrid orbitals from LIST–I with complex(es) given in LIST–II.…
Q24 2017 Paper 1

Addition of excess aqueous ammonia to a pink coloured aqueous solution of MCl$_2$·6H$_2$O (**X**) and…
Q25 2016 Paper 1

Among [Ni(CO)$_4$], [NiCl$_4$]$^{2-}$, [Co(NH$_3$)$_4$Cl$_2$]Cl, Na$_3$[CoF$_6$], Na$_2$O$_2$ and CsO$_2$…
Q26 2016 Paper 1

The number of geometric isomers possible for the complex $[\mathrm{CoL_2Cl_2}]^-$…
Q27 2016 Paper 2

The geometries of the ammonia complexes of Ni$^{2+}$, Pt$^{2+}$ and Zn$^{2+}$, respectively, are
Q28 2015 Paper 1

For the octahedral complexes of Fe$^{3+}$ in SCN$^-$ (thiocyanato-S) and in CN$^-$ ligand environments, the…
Q29 2015 Paper 2

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of Fe–C bond(s) is
Q30 2015 Paper 2

Among the complex ions, $[Co(NH_2\text{-}CH_2\text{-}CH_2\text{-}NH_2)_2Cl_2]^+$, $[CrCl_2(C_2O_4)_2]^{3-}$…
Q31 2014 Paper 2

Match each coordination compound in List-I with an appropriate pair of characteristics from List-II and…
Q32 2013 Paper 1

Consider the following complex ions, $P$, $Q$ and $R$.…
Q33 2013 Paper 1

The pair(s) of coordination complexes/ions exhibiting the same kind of isomerism is(are)
Q34 2013 Paper 1

$EDTA^{4-}$ is ethylenediaminetetraacetate ion. The total number of $N{-}Co{-}O$ bond angles in…
Q35 2012 Paper 1

The colour of light absorbed by an aqueous solution of CuSO$_4$ is
Q36 2012 Paper 1

As per IUPAC nomenclature, the name of the complex [Co(H$_2$O)$_4$(NH$_3$)$_2$]Cl$_3$ is
Q37 2012 Paper 2

$NiCl_2\{P(C_2H_5)_2(C_6H_5)\}_2$ exhibits temperature dependent magnetic behaviour (paramagnetic /…
Q38 2012 Paper 2

For the given aqueous reactions, which of the statement(s) is (are) true ? (with a figure)
Q39 2011 Paper 1

Geometrical shapes of the complexes formed by the reaction of Ni$^{2+}$ with Cl$^-$, CN$^-$ and H$_2$O…
Q40 2011 Paper 2

Among the following complexes (K–P)…
Q41 2011 Paper 2

The volume (in mL) of 0.1 M $AgNO_3$ required for complete precipitation of chloride ions present in 30 mL of…
Q42 2010 Paper 1

The correct structure of ethylenediaminetetraacetic acid (EDTA) is (with a figure)
Q43 2010 Paper 1

The ionization isomer of $[Cr(H_2O)_4Cl(NO_2)]Cl$ is
Q44 2010 Paper 2

The complex showing a spin-only magnetic moment of 2.82 B.M. is
Q45 2010 Paper 2

Total number of geometrical isomers for the complex $[RhCl(CO)(PPh_3)(NH_3)]$ is
Q46 2009 Paper 1

The compound(s) that exhibit(s) geometrical isomerism is(are)
Q47 2009 Paper 2

The spin only magnetic moment value (in Bohr magneton units) of Cr(CO)$_6$ is
Q48 2009 Paper 2

The number of water molecule(s) directly bonded to the metal centre in $\mathrm{CuSO_4\cdot5H_2O}$ is
Q49 2008 Paper 2

Among the following, the coloured compound is
Q50 2008 Paper 2

Both [Ni(CO)$_4$] and [Ni(CN)$_4$]$^{2-}$ are diamagnetic. The hybridisations of nickel in these complexes…
Q51 2008 Paper 2

The IUPAC name of [Ni(NH$_3$)$_4$][NiCl$_4$] is
Q52 2008 Paper 2

STATEMENT-1: [Fe(H$_2$O)$_5$NO]SO$_4$ is paramagnetic.…
Q53 2008 Paper 2

STATEMENT-1: The geometrical isomers of the complex [M(NH$_3$)$_4$Cl$_2$] are optically inactive.…
Q54 2007 Paper 1

Match the complexes in Column I with their properties listed in Column II. Indicate your answer by darkening…
Q55 2007 Paper 2

Among the following metal carbonyls, the C-O bond order is lowest in