List of top Chemistry Questions on Coordination chemistry asked in JEE Main

‘x’ is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ‘y’ is the major product obtained from the benzene by reacting it with ethanoyl chloride in the presence of anhydrous AlCl$_3$. Product (major) obtained by heating x and y in the presence of alkali is z. Total number of $\pi$ (pi) electrons in z is _______.
Given below are two statements for catalytic properties of transition metals.
Statement I: First row transition metals which act as catalyst utilise their 3d electrons only for formation of bonds between reactant molecules and atoms on the surface of catalyst.
Statement II: There is increase in the concentration of reactants on the surface of catalyst which strengthens the bonds in reacting molecules.
An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with \(Cl_2/h\nu\), (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is _____.
Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds?}
  • [A.] \([NiCl_4]^{2-}\) -- \(sp^3\), tetrahedral, paramagnetic
  • [B.] \([Ni(NH_3)_6]^{2+}\) -- \(sp^3d^2\), octahedral, paramagnetic
  • [C.] \([Ni(CO)_4]\) -- \(sp^3\), tetrahedral, paramagnetic
  • [D.] \([Ni(CN)_4]^{2-}\) -- \(dsp^2\), square planar, diamagnetic
Choose the correct answer.
Identify the correct statements from the following
A. $[Fe(C_2O_4)_3]^{3-}$ is the most stable complex among $[Fe(OH)_6]^{3-}$, $[Fe(C_2O_4)_3]^{3-}$ and $[Fe(SCN)_6]^{3-}$
B. The stability of $[Cu(NH_3)_4]^{2+}$ is greater than that of $[Cu(en)_2]^{2+}$
C. The hybridization of Fe in $K_4[Fe(CN)_6]$ is $d^2sp^3$
D. $[Fe(NO_2)_3Cl_3]^{3-}$ exhibits linkage isomerism
E. $NO_2^-$ and $SCN^-$ ligands are NOT ambidentate ligands
Choose the correct answer from the options given below :
Given below are two statements :
Statement I : Aluminium upon reaction with NaOH forms $[Al(OH)_6]^{3-}$ ion.
Statement II : The geometry of $ICl_4^-$, $ClO_3^-$ and $IBr_2^-$ is square planar, pyramidal and linear respectively.
In the light of the above statements, choose the correct answer from the options given below :
The surface of sodium metal is irradiated with radiation of wavelength \( x \) nm. The kinetic energy of ejected electrons is \( 2.8 \times 10^{-20} \) J. The work function of sodium is 2.3 eV. The value of \( x \) is _______ \( \times 10^2 \) nm. (Nearest integer)}
5.33 g of \(CrCl_3 \cdot 6H_2O\), which is a 1:3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride ions in the eluted solution, on treatment with \(AgNO_3\), results in 8.61 g of \(AgCl\). The ratio of moles of complex reacted and moles of \(AgCl\) formed is ______ \(\times 10^{-2}\). (Nearest integer)} \[ [Molar\ mass: Cr = 52,\ Ag = 108,\ Cl = 35.5,\ H = 1,\ O = 16] \]
Match the following:
Statement I: Among the following set of ionic species, [Cr³⁺, Mn²⁺]; [Ti⁴⁺, V²⁺]; [Sc³⁺, V⁴⁺] and [Co³⁺, Cu²⁺] three sets have both ions are coloured.
Statement II: Among the following set of ionic species [Lu³⁺, La³⁺]; [Ln³⁺, Ce⁴⁺]; [Yb²⁺, Eu²⁺] and [Nd³⁺, Sm³⁺] three sets have both ions diamagnetic in nature.
For the given coordination compounds:
1) \([Co(ox)_3]^{3-}\) 2) \([Fe(CN)_6]^{3-}\) 3) \([Ni(CN)_4]^{2-}\) 4) \([NiCl_4]^{2-}\)
5) \([Ni(CO)_4]\) 6) \([MnBr_4]^{2-}\) 7) \([CoF_6]^{3-}\) 8) \([Cr(H_2O)_3F_3]\)
The number of paramagnetic species are:
The hybridisation states of Ni in the 3 complexes Ni(CO)\(_4\), [Ni(NH\(_3\))\(_6\)]\(^{2+}\), [Ni(CN)\(_4\)]\(^{2-}\) are
For tetrahedral complex, the correct order of energy of \(d\)-orbitals is:
Which of the ions show positive Borax Bead test and has the largest ionization energy:
Which of the following compounds shows coordination isomerism?
(A) \( [\text{Fe(NH}_3)_6] [\text{Co(CN)}_6] \)
(B) \( [\text{Cr(NH}_3)_6] [\text{Co(CN)}_6] \)
(C) \( [\text{Co(NH}_3)_6] [\text{Co(CN)}_6] \)
(D) \( [\text{Ag(NH}_3)_2] [\text{Ag(CN)}_2] \)
(E) \( [\text{Fe(NH}_3)_6] [\text{Cr(CN)}_6] \)
Arrange the following complexes in increasing order of C.F.S.E. (\( \Delta_0 \))
(a) \( [\text{Co}(\text{H}_2\text{O})_6]^{2+} \)
(b) \( [\text{Co}(\text{H}_2\text{O})_6]^{3+} \)
(c) \( [\text{Co}(\text{en})_3]^{3+} \)
The number of paramagnetic metal complex species among $ [Co(NH_3)_6]^{3+}, [Co(C_2O_4)_3]^{3-}, [MnCl_6]^{3-}, [Mn(CN)_6]^{3-}, [CoF_6]^{3-}, [Fe(CN)_6]^{3-} $ and $ [FeF_6]^{3-} $ with same number of unpaired electrons is _____.
The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively : $ [Fe(CN)_6]^{3-}, [FeF_6]^{3-}, [CoF_6]^{3-}, [Mn(CN)_6]^{3-} $

Match List-I with List-II

Choose the correct answer from the options given below :

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\(_3\)] 
Choose the correct answer from the options given below :

Number of stereoisomers possible for the complexes, $\left[\mathrm{CrCl}_{3}(\mathrm{py})_{3}\right]$ and $\left[\mathrm{CrCl}_{2}(\mathrm{ox})_{2}\right]^{3-}$ are respectively} (py = pyridine, ox = oxalate)

Which one of the following complexes will have $\Delta_{0}=0$ and $\mu=5.96$ B.M.?

The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ______ $ FeCl_3 + KOH + H_2C_2O_4 \rightarrow A $
The correct order of the complexes
[5pt] $[\text{Co(NH}_3)_5(\text{H}_2\text{O})]^{3+}$ (A),
[3pt] $[\text{Co(NH}_3)_6]^{3+}$ (B),
[3pt] $[\text{Co(CN)}_6]^{3-}$ (C),
[3pt] $[\text{CoCl(NH}_3)_5]^{2+}$ (D)
[5pt] in terms of wavelength of light absorbed is:

The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are 
A. $ Cr^{2+} $ 
B. $ Fe^{2+} $ 
C. $ Fe^{3+} $ 
D. $ Co^{2+} $ 
E. $ Mn^{2+} $ 
Choose the correct answer from the options given below