(a) When a coordination compound $ ext{CoCl}_3 \cdot 6 ext{NH}_3$ is mixed with excess of $ ext{AgNO}_3$ solution, $3$ moles of $ ext{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the complex, IUPAC name, its hybridisation and magnetic behaviour on the basis of va...
CBSE CLASS 12 • CHEMISTRY • CHAPTER 05
Coordination Compounds
217 distinct questions across 262 board paper set appearances (2022–2026).
(a) Write IUPAC names of the following coordination compounds :
(i) $[\text{Ag}(\text{NH}_3)_2] [\text{Ag}(\text{CN})_2]$
(ii) $\text{K}_3[\text{Fe}(\text{C}_2\text{O}_4)_3]$
OR
(b) (i) Give a chemical test to show that $[\text{Co}(\text{NH}_3)_5\text{SO}_4]\text{Cl}$ and $[\text{Co}(\text{NH}_3)_5\...
The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbita...
According to Werner's theory, the primary valencies of the central metal atom :
(A) are satisfied by neutral molecules or negative ions.
(B) are equal to its coordination number.
(C) are satisfied by negative ions.
(D) are non-ionisable.
Which of the following ligands forms a chelate complex ?
(A) Ammonia
(B) Water
(C) $\text{NO}_2^-$
(D) Oxalate ion
According to Alfred Werner, the secondary valence(s) of the central metal atom/ion in a complex :
(A) are non-ionisable
(B) are ionisable
(C) are satisfied by neutral molecules or negative ions
(D) is equal to the coordination number and is normally fixed for a metal
Identify the incorrect statement...
(a) Write the IUPAC name of the complex $[ ext{Pt}( ext{en})_2 ext{Cl}_2]^{2+}$. Draw the structure of geometrical isomer of this complex which is optically inactive.
OR
(b) (i) Write the formula of the following coordination compound :
Pentaamminecarbonatocobalt(III)chloride
(ii) Write the IUPAC na...
The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangemen...
One of the most distinctive properties of transition metal complexes is their wide range of colours. This means that some of the visible spectrum is being removed from white light as it passes through the sample, so the light that emerges is no longer white. The colour of the complex is complementar...
When a coordination compound $\text{NiCl}_2 \cdot 6\text{H}_2\text{O}$ is mixed with $\text{AgNO}_3$ solution, 2 moles of $\text{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the complex and secondary valency for Nickel ion.
(a) Which of the following species cannot act as a ligand ? Give reason. $\text{OH}^-$, $\text{NH}_4^+$, $\text{CH}_3\text{NH}_2$, $\text{H}_2\text{O}$
(b) The complex $[\text{Co}(\text{NH}_3)_5(\text{NO}_2)]\text{Cl}_2$ is red in colour. Give IUPAC name of its linkage isomer.
Which of the following is heteroleptic complex ?
(A) $[\text{Co}(\text{NH}_3)_6]^{3+}$
(B) $[\text{Cr}(\text{NH}_3)_6]^{3+}$
(C) $[\text{Ni}(\text{H}_2\text{O})_6]^{2+}$
(D) $[\text{Co}(\text{NH}_3)_4\text{Cl}_2]^+$
(a) Define coordination number.
(b) Indicate the type of isomerism exhibited by the following complex :
$[\text{Co}(en)_3]\text{Cl}_3$
The correct IUPAC name of the complex $[ ext{Pt}( ext{NH}_3)_2 ext{Cl}_2]$ is :
(A) diamminedichloridoplatinum (IV)
(B) diamminedichloridoplatinum (II)
(C) dichloridodiammineplatinum (IV)
(D) dichloridodiammineplatinum (II)
(b) Define the following terms with a suitable example in each case :
(i) Ambidentate ligand
(ii) Double salt
Which of the following d-orbitals experience more repulsion in the crystal field splitting of octahedral complex ?
(A) $d_{xy}, d_{yz}, d_{xz}$
(B) $d_{x^2-y^2}, d_{z^2}$
(C) $d_{xy}, d_{x^2-y^2}$
(D) $d_{xz}, d_{z^2}$
Assertion (A) : Out of $[\text{Co}(\text{en})_3]^{3+}$ and $[\text{Co}(\text{CN})_6]^{3-}$, coordination compound $[\text{Co}(\text{en})_3]^{3+}$ is a more stable complex.
Reason (R) : Ethane-1,2-diamine is a chelating ligand.
(a) One mole of $\text{CrCl}_3 \cdot 4\text{H}_2\text{O}$ precipitates one mole of $\text{AgCl}$ when treated with excess of $\text{AgNO}_3$ solution. Write (i) the structural formula of the complex, and (ii) the secondary valency of $\text{Cr}$.
(b) What is the difference between a complex and a double salt ?
(c) (ii) Write two differences between primary and secondary valences in coordination compounds.
(a) Write IUPAC names of the following coordination compounds :
(i) $\text{[CoCl}_2\text{(en)}_2\text{]SO}_4$
(ii) $\text{K}_3\text{[Fe(C}_2\text{O}_4)_3]$
OR
(b) Differentiate between :
(i) Double salt and Complex compound
(ii) Didentate ligand and Ambidentate ligand
Attempt any five of the following : (a) Write the IUPAC name of the complex : $[\text{Co}(\text{H}_2\text{O})(\text{CN})(\text{en})_2]^{2+}$ (b) Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion?
The most stable complex among the following is :
(A) $[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$
(B) $[\text{Ag}(\text{NH}_3)_2]\text{Cl}$
(C) $[\text{Pt}(\text{en})_2\text{Cl}_2]^{2+}$
(D) $\text{K}_4 [\text{Fe}(\text{CN})_6]$
The geometry of diamagnetic nickel complex $[\text{Ni}(\text{CN})_4]^{2-}$ is :
(A) Tetrahedral
(B) Octahedral
(C) Square planar
(D) Distorted octahedral
Considering the strength of the ligand, the highest excitation energy will be observed in :
(A) $[\text{Co}(\text{H}_2\text{O})_6]^{3+}$
(B) $[\text{Co}(\text{NH}_3)_6]^{3+}$
(C) $[\text{Co}(\text{CN})_6]^{3-}$
(D) $[\text{CoCl}_6]^{3-}$
The IUPAC name of the complex $[\text{Co}(\text{NH}_3)_5(\text{NO}_2)]\text{Cl}_2$ is :
(A) Pentaamminenitrito-O-cobalt(III) chloride
(B) Pentaamminenitrito-N-cobalt(III) chloride
(C) Pentaamminenitro-cobalt(III) chloride
(D) Pentaamminenitrito-cobalt(II) chloride
Assertion (A) : Low spin tetrahedral complexes are rarely observed.
Reason (R) : Crystal field splitting energy is less than pairing energy for tetrahedral complexes.
32. In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are ionisable and are satisfied by negatively charged ions. Secondary valencies are non-ionisable and are satisfied by neutral or negative ions having lone pair of electrons. Primary valencies ...
(ii) What is the secondary valency of [Co(en)$_3$]$^{3+}$ ?
(iii) (1) Write the formula of Iron(III)hexacyanidoferrate(II). (2) Write the IUPAC name of [Co(NH$_3$)$_5$Cl] Cl$_2$.
OR
(iii) Give reasons :
(1) Low spin tetrahedral complexes are not formed.
(2) $[\text{Co}(\text{NH}_3)_6]^{3+}$ is an inner orbital complex whereas $[\text{Ni}(\text{NH}_3)_6]^{2+}$ is an outer orbital complex.
[Atomic number : $\text{Co} = 27, \text{Ni} = 28$]
Answer any three of the following questions :
(a) Explain the type of hybridization in $[\text{Fe}(\text{CN})_6]^{3-}$ on the basis of valence bond theory. (Given : Atomic number of $\text{Fe} = 26$)
(b) Draw the geometrical isomers of $[\text{PtCl}_2(\text{en})_2]^{2+}$ ion.
(c) $[\text{NiCl}_4]^{2...
Oxidation state of central metal atom in the given complex is :
$[\text{Co}(\text{NH}_3)_4(\text{H}_2\text{O})_2]\text{Cl}_3$
(a) $+ 2$
(b) $+ 3$
(c) $+ 1$
(d) $+ 4$
(a) Using valence bond theory, predict the hybridization and magnetic character of following : $[\text{CoF}_6]^{3-}$ [Atomic number of $\text{Co} = 27$] (b) Write IUPAC name of the following complex : $[\text{CoBr}_2(\text{en})_2]^+$ (c) How many ions are produced from the complex $[\text{Co}(\text{...
The secondary valency of Co in the complex $[\text{Co(NH}_3)_5(\text{NO}_2)]^{2+}$ is
(A) 5
(B) 1
(C) 4
(D) 6
(b) Using crystal field theory, write the electronic configuration of central metal atom/ion of the following :
(i) $\text{[CoF}_6]^{3-}$
(ii) $\text{[Co(NH}_3)_6]^{3+}$
[At. No. : $\text{Co} = 27$]
(c) $\text{[NiCl}_4]^{2-}$ is paramagnetic while $\text{[Ni(CO)}_4]$ is diamagnetic though both are tetrahedral. Why ?
[Atomic No. : $\text{Ni} = 28$]
(c) Write hybridization and magnetic behaviour of the complex $\text{[Fe(CN)}_6]^{3-}$.
[Atomic No. : $\text{Fe} = 26$]
The secondary valency of $\text{Pt}$ in $[\text{Pt}(\text{en})_2\text{Cl}_2]^{2+}$ is
(A) $6$
(B) $5$
(C) $4$
(D) $2$
The secondary valency of Co in $[ ext{Co}( ext{en})_3]^{3+}$ is
(A) $4$
(B) $3$
(C) $5$
(D) $6$
The correct IUPAC name of the complex $[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$ is :
(A) diamminedichloridoplatinum (IV)
(B) diamminedichloridoplatinum (II)
(C) dichloridodiammineplatinum (IV)
(D) dichloridodiammineplatinum (II)
(a) $[\text{Co}(\text{NH}_3)_6]^{3+}$ is diamagnetic whereas $[\text{CoF}_6]^{3-}$ is paramagnetic. Justify the statement. [Atomic number of $\text{Co} = 27$]
(b) Write the electronic configuration for $d^4$ ion if $\Delta_0 > \text{P}$ on the basis of crystal field theory.
Which of the following is heteroleptic complex ?
(A) $[ ext{Co}( ext{NH}_3)_6]^{3+}$
(B) $[ ext{Cr}( ext{NH}_3)_6]^{3+}$
(C) $[ ext{Ni}( ext{H}_2 ext{O})_6]^{2+}$
(D) $[ ext{Co}( ext{NH}_3)_4 ext{Cl}_2]^+$
(a) Define didendate ligand. Give an example.
(b) Indicate the type of isomerism exhibited by the given complex :
$[\text{Pt}(\text{NH}_3)(\text{H}_2\text{O})\text{Cl}_2]$
(a) $[\text{Fe}(\text{H}_2\text{O})_6]^{2+}$ is paramagnetic whereas $[\text{Fe}(\text{CO})_5]$ is diamagnetic. Justify the statement. [Atomic number of $\text{Fe} = 26$]
(b) On the basis of crystal field theory write the electronic configuration for $d^4$ ion if $\Delta_0 < \text{P}$.
(a) Explain why $[\text{Fe}(\text{H}_2\text{O})_6]^{3+}$ is strongly paramagnetic whereas $[\text{Fe}(\text{CN})_6]^{3-}$ is weakly paramagnetic. [Atomic number of $\text{Fe} = 26$]
(b) On the basis of crystal field theory, write the electronic configuration for $d^5$ ion for which $\Delta_0 < \tex...
Amongst the following, the most stable complex is :
(A) $[ ext{FeCl}_6]^{3-}$
(B) $[ ext{Fe(NH}_3)_6]^{3+}$
(C) $[ ext{Fe(H}_2 ext{O)}_6]^{3+}$
(D) $[ ext{Fe(C}_2 ext{O}_4)_3]^{3-}$
What is meant by didentate and ambidentate ligands ? Give an example of each.
(a) What is crystal field splitting energy ? Write the electronic configuration of $ ext{d}^4$ ions on the basis of crystal field theory when :
(i) $\Delta_{ ext{o}} < ext{P}$, and
(ii) $\Delta_{ ext{o}} > ext{P}$.
OR
(b) Write the hybridization and magnetic behaviour of each of the following co...
The secondary valency of $\text{Co}$ in $[\text{Co}(\text{en})_3]_2(\text{SO}_4)_3$ is :
(A) $12$
(B) $2$
(C) $3$
(D) $6$
Vitamin $\text{B}_{12}$ is a complex compound of :
(A) $\text{Fe}^{2+}$
(B) $\text{Mg}^{2+}$
(C) $\text{Co}^{3+}$
(D) $\text{Cu}^{2+}$
Define the following terms :
(a) Ambidentate ligand
(b) Crystal field splitting energy
(a) Give reasons :
(i) Why are low spin tetrahedral complexes not formed ?
(ii) Why is $[\text{Co(en)}_3]^{3+}$ complex more stable than $[\text{Co(NH}_3)_6]^{3+}$ ?
(iii) Why are geometrical isomers not possible for tetrahedral complexes having two different types of unidentate ligands coordinated ...
(a) Write IUPAC names of the following compounds :
(i) $[ ext{PtCl}_2( ext{en})_2] ext{SO}_4$
(ii) $( ext{NH}_4)_2[ ext{CoF}_4]$
OR
(b) Define the following terms with a suitable example in each case :
(i) Ambidentate ligand
(ii) Double salt
(a) Answer the following questions about the complexes $[ ext{NiCl}_4]^{2-}$ and $[ ext{Ni(CN)}_4]^{2-}$
(i) Write the hybridization involved in each case.
(ii) Which of them is the inner orbital complex and which one is the outer orbital complex ?
(iii) Compare their magnetic behaviour.
[Atomic...
Assertion (A) : Order of reaction is not applicable for elementary reaction but applicable for complex reaction.\nReason (R) : Order of reaction is an experimental quantity.
(a) Answer the following questions about the complexes $\text{[NiCl}_4\text{]}^{2-}$ and $\text{[Ni(CN)}_4\text{]}^{2-}$
(i) Write the hybridization involved in each case.
(ii) Which of them is the inner orbital complex and which one is the outer orbital complex ?
(iii) Compare their magnetic behav...
Assertion (A) : Order of reaction is applicable to elementary as well as complex reactions.\nReason (R) : For a complex reaction, molecularity has no meaning.
(a) Answer the following questions about the complexes $[\text{NiCl}_4]^{2-}$ and $[\text{Ni(CN)}_4]^{2-}$
(i) Write the hybridization involved in each case.
(ii) Which of them is the inner orbital complex and which one is the outer orbital complex ?
(iii) Compare their magnetic behaviour.
[Atomic n...
(b) (i) Name two coordination compounds which are important in biological systems.
(ii) What is meant by chelate effect ? Give an example.
(iii) Why are low spin tetrahedral complexes rarely formed ?
The chelating ligand used for the treatment of lead poisoning is :
(A) Ethane-1,2-diamine
(B) Oxalate ion
(C) Dimethylglyoxime
(D) EDTA
Which of the following $d$-orbitals experience more repulsion in the crystal field splitting of tetrahedral complex ?
(A) $d_{x^2-y^2}, d_{z^2}$
(B) $d_{x^2-y^2}, d_{xy}$
(C) $d_{xy}, d_{yz}, d_{z^2}$
(D) $d_{xy}, d_{yz}, d_{xz}$
Number of possible stereoisomers for the complex $[ ext{Co}( ext{en})_2 ext{Cl}_2] ext{Cl}$ will be :
(A) 3
(B) 4
(C) 2
(D) 1
Assertion (A) : For complex reaction, order of reaction is given by the fast step.
Reason (R) : Order of reaction is determined experimentally.
Write the formulas for the following coordination compounds :
(a) Mercury(I) tetrathiocyanato-S-cobaltate(III)
(b) Dichloridobis (ethane-1,2-diamine) platinum(IV) nitrate
(b) (i) How many geometrical isomers are possible in each of the following complexes ?
(I) $[ ext{Cr}( ext{C}_2 ext{O}_4)_3]^{3-}$
(II) $[ ext{Co}( ext{NH}_3)_3 ext{Cl}_3]$
(ii) $[ ext{Co}( ext{NH}_3)_6]^{3+}$ is an inner orbital complex whereas $[ ext{Ni}( ext{NH}_3)_6]^{2+}$ is an outer orbital co...
The coordination number of $\text{Co}$ in $[\text{Co}(\text{en})_2\text{Cl}_2]^+$ is :
(A) $4$
(B) $3$
(C) $6$
(D) $2$
Assertion (A) : For complex reaction, order of reaction is given by the slowest step.
Reason (R) : Order of reaction is not applicable for the complex reaction.
(a) When a coordination compound $ ext{CoCl}_3 \cdot 6 ext{NH}_3$ is mixed with excess of $ ext{AgNO}_3$ solution, $3\text{ moles}$ of $ ext{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the complex, IUPAC name, its hybridisation and magnetic behaviour on the basi...
(a) Write the IUPAC name of the following complex :
$\text{K}_3[\text{Cr}(\text{C}_2\text{O}_4)_3]$
(b) Differentiate between homoleptic complex and heterolyptic complex.
(c) Which type of isomerism is exhibited by the following complex :
$[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$
(a) A coordination compound $\text{CrCl}_3 \cdot 6\text{H}_2\text{O}$ is mixed with excess of $\text{AgNO}_3$ solution, two moles of $\text{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the coordination compound.
(b) Write the oxidation state and hybridisation of ...
Write the IUPAC name of the given complex :
$[\text{Co}(\text{NH}_3)_4(\text{H}_2\text{O})\text{Cl}] \text{Cl}_2$
Define polydentate ligand. Give an example.
Mention the type of isomerism exhibited by the given complex :
$[\text{Co}(\text{en})_3]\text{Cl}_3$
A coordination compound $\text{CrCl}_3 \cdot 6\text{H}_2\text{O}$ is mixed with excess of $\text{AgNO}_3$ solution, one mole of $\text{AgCl}$ is precipitated per mole of the compound. Write the structural formula of the coordination compound.
Write the oxidation state and hybridisation of the central metal in the given complex : $[\text{Fe}(\text{CN})_6]^{3-}$. [Atomic number : $\text{Fe} = 26$]
(a) Write the IUPAC name of the given complex :
$\text{K}_2[\text{Zn}(\text{OH})_4]$
(b) Differentiate between a double salt and a complex.
(c) Mention the type of isomerism exhibited by the following complex :
$[\text{Pt}(\text{NH}_3)(\text{H}_2\text{O})\text{Cl}_2]$
(a) A coordination compound $\text{CrCl}_3 \cdot 6\text{H}_2\text{O}$ is mixed with excess of $\text{AgNO}_3$ solution, three moles of $\text{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the coordination compound.
(b) Write the oxidation state and hybridisation of the central metal in the given complex : $[\text{Cr}(\text{NH}_3)_6]^{3+}$. [Atomic number : $\text{Cr} = 24$]
(a) (i) (I) Explain why $[\text{Fe}(\text{CN})_6]^{3-}$ is an inner orbital complex, whereas $[\text{FeF}_6]^{3-}$ is an outer orbital complex.
[Atomic number : $\text{Fe} = 26$]
(II) Write the formula of the given complex :
Hexaamminenickel (II) chloride
(a) (i) (I) Explain why $[ ext{Fe}( ext{CN})_6]^{3-}$ is an inner orbital complex, whereas $[ ext{FeF}_6]^{3-}$ is an outer orbital complex.
[Atomic number : $ ext{Fe} = 26$]
(II) Write the formula of the given complex :
Hexaamminenickel (II) chloride
(ii) A solution of $[ ext{Ni}( ext{H}_2 ext{...
Assertion (A) : Out of $[ ext{Co}(en)_3]^{3+}$ and $[ ext{Co}( ext{CN})_6]^{3-}$, coordination compound $[ ext{Co}(en)_3]^{3+}$ is a more stable complex.
Reason (R) : Ethane-1,2-diamine is a chelating ligand.
33. (a) (i) (I) Explain why $[ ext{Fe}( ext{CN})_6]^{3-}$ is an inner orbital complex, whereas $[ ext{FeF}_6]^{3-}$ is an outer orbital complex.
[Atomic number : $ ext{Fe} = 26$]
(II) Write the formula of the given complex :
Hexaamminenickel (II) chloride
(ii) A solution of $[ ext{Ni}( ext{H}_2 ex...
Write the formula of the following coordination complex:
I. diaquasilver(I) dichloridoargentate(I)
II. dihydroxidobis(triphenylphosphine)nickel(II)
Iron-EDTA complex in food fortification
Food fortification is defined as the practice of adding vitamins and minerals to commonly consumed foods during processing to increase their nutritional value. It is a proven, safe and cost-effective strategy for improving diets and for the prevention and con...
III. What is the denticity of the ligand in the $ ext{Fe(III)}$ EDTA complex. Name the atom(s) through which it can bind to the central metal ion.
Based on the information provided above, answer the following questions:
I. Why is $ ext{Fe(III)}$-EDTA complex stable as compared to Ferrous sulphate?
OR
What happens when hard water is titrated against $ ext{Na}_2 ext{EDTA}$?
II. You are a doctor, working in Somalia. Will you recommend iron fo...
(a) Define Crystal Field Splitting Energy. On the basis of Crystal Field theory, explain why complex $[ ext{Ti}( ext{H}_2 ext{O})_6]^{3+}$ is coloured ?\n[Atomic No. of $ ext{Ti} = 22$]\nOR\n(b) (i) What type of isomerism is shown by the complex $[ ext{Co}( ext{NH}_3)_5( ext{SCN})]^{2+}$ ?\n(ii) Wha...
Werner proposed the concept of a primary valence and a secondary valence for a metal ion. The primary valences are normally ionisable and are satisfied by negative ions. The secondary valences are non-ionisable. These are satisfied by neutral molecules or negative ions. The secondary valency is equa...
(a) (i) Give reasons :
(I) $[\text{Ni(CO)}_4]$ is diamagnetic whereas $[\text{NiCl}_4]^{2-}$ is paramagnetic. [Atomic number : $\text{Ni} = 28$]
(II) $\text{CO}$ is a stronger complexing agent than $\text{NH}_3$.
(III) The trans isomer of complex $[\text{Co(en)}_2\text{Cl}_2]^+$ is optically inact...
(a) (i) Give reasons :
(I) $[ ext{Ni(CO)}_4]$ is diamagnetic whereas $[ ext{NiCl}_4]^{2-}$ is paramagnetic. $[ ext{Atomic number} : ext{Ni} = 28]$
(II) $ ext{CO}$ is a stronger complexing agent than $ ext{NH}_3$.
(III) The trans isomer of complex $[ ext{Co(en)}_2 ext{Cl}_2]^+$ is optically inactive...
(a) (i) Give reasons :
(I) $\text{[Ni(CO)}_4\text{]}$ is diamagnetic whereas $\text{[NiCl}_4\text{]}^{2-}$ is paramagnetic. [Atomic number : $\text{Ni} = 28$]
(II) $\text{CO}$ is a stronger complexing agent than $\text{NH}_3$.
(III) The trans isomer of complex $\text{[Co(en)}_2\text{Cl}_2\text{]}^+$...
(a) What is meant by crystal field splitting energy ? For a $d^4$ ion, write the configuration if (i) $\Delta_0 < \text{P}$, and (ii) $\Delta_0 > \text{P}$.
(b) Explain why in tetrahedral coordination entities, low spin configurations are rarely observed.
Werner's coordination theory in $1893$ was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in $1897$, and before the electronic theory of valency. Werner did not have an...
Write two differences between primary and secondary valences in coordination compounds.
(a) Write the name and structure of a hexadentate ligand.
According to Werner's theory of coordination compounds :
(A) Primary valences are ionisable.
(B) Secondary valences are ionisable.
(C) Both primary and secondary valences are non-ionisable.
(D) Both primary and secondary valences are ionisable.
Which of the following complex ion is $\textit{not}$ optically active ?
(A) $[\text{Co}(\text{ox})_3]^{3-}$
(B) $\text{\textit{cis}}-[\text{Co}(\text{en})_2\text{Cl}_2]^+$
(C) $\text{\textit{trans}}-[\text{Co}(\text{en})_2\text{Cl}_2]^+$
(D) $[\text{Co}(\text{en})_3]^{3+}$
(a) Answer the following about the complexes $[\text{FeF}_6]^{3-}$ and $[\text{Fe(CN)}_6]^{4-}$ :
(i) Write the hybridization involved in each case.
(ii) Which of them is the outer orbital complex and which one is the inner orbital complex ?
(iii) Compare their magnetic behaviour.
[Atomic number : $...
Coordination number of $ ext{Fe}$ in $[ ext{Fe}( ext{C}_2 ext{O}_4)_3]^{3-}$ is :
(A) 6
(B) 3
(C) 4
(D) 5
Which of the following complexes shows geometrical isomerism ?
(A) $\text{[Co(NH}_3)_6]^{3+}$
(B) $\text{[Co(NH}_3)_5\text{Cl}]^{2+}$
(C) $\text{[Co(NH}_3)_4\text{Cl}_2]^+
(D) $\text{[Co(NH}_3)_5(\text{ONO})]^{2+}$
(a) Answer the following about the complexes $[\text{FeF}_6]^{3-}$ and $[\text{Fe(CN)}_6]^{4-}$ :\n(i) Write the hybridization involved in each case.\n(ii) Which of them is the outer orbital complex and which one is the inner orbital complex ?\n(iii) Compare their magnetic behaviour.\n[Atomic number...
The primary and secondary valences of $\text{Co}$ in $\text{[Co(en)}_3\text{]Cl}_3$ respectively are :
(A) $3, 3$
(B) $0, 3$
(C) $6, 3$
(D) $3, 6$
(a) Write IUPAC names of the following coordination compounds :
(i) $[ ext{CoCl}_2( ext{en})_2] ext{SO}_4$
(ii) $ ext{K}_3[ ext{Fe}( ext{C}_2 ext{O}_4)_3]$
OR
(b) Differentiate between :
(i) Double salt and Complex compound
(ii) Didentate ligand and Ambidentate ligand
(a) Answer the following about the complexes $[ ext{FeF}_6]^{3-}$ and $[ ext{Fe}( ext{CN})_6]^{4-}$ :
(i) Write the hybridization involved in each case.
(ii) Which of them is the outer orbital complex and which one is the inner orbital complex ?
(iii) Compare their magnetic behaviour.
[Atomic number...
(a) On the basis of CFT, explain why $[ ext{Ti}( ext{H}_2 ext{O})_6] ext{Cl}_3$ complex is coloured ? What happens on heating the complex $[ ext{Ti}( ext{H}_2 ext{O})_6] ext{Cl}_3$ ? Give reason.
[Atomic no. : $ ext{Ti} = 22$]
(b) (i) What is crystal field splitting energy ?
(b) (ii) On the basis of $\Delta_0$ and $ ext{P}$ (pairing energy), how can you differentiate between a strong field ligand and a weak field ligand ?
(a) Write IUPAC name of the complex $[ ext{Co}( ext{NH}_3)_5( ext{ONO})]^{2+}$.
(b) Write the hybridization of $[ ext{Ni}( ext{CN})_4]^{2-}$ and predict its magnetic behaviour. [Atomic number : $ ext{Ni} = 28$]
(c) What type of isomerism is shown by the given complex : $[ ext{Co}( ext{NH}_3)_6][ ext...
(a) Write IUPAC name of the complex $[ ext{Co}( ext{H}_2 ext{O})( ext{CN})( ext{en})_2]^{2+}$.
(b) Write the hybridization of $[ ext{Ni}( ext{CO})_4]$ and predict its magnetic behaviour. [Atomic number : $ ext{Ni} = 28$]
(c) What type of isomerism is shown by $[ ext{Co}( ext{en})_3]^{3+}$ ?
(a) What is spectrochemical series ? Write the relationship between $\Delta_{\text{t}}$ and $\Delta_{\text{o}}$.
(b) (ii) On the basis of crystal field theory, write the electronic configuration of $\text{d}^5$ ion if $\Delta_{\text{o}} < \text{P}$.
(c) Define crystal field splitting energy.
(a) Write IUPAC name of the complex $[\text{CoBr}_2(\text{en})_2]^+$.
(b) Write the hybridization of the complex $[\text{NiCl}_4]^{2-}$ and predict its magnetic behaviour. [ Atomic mass : $\text{Ni} = 28$]
(c) What type of isomerism is shown by the complex $[\text{Co}(\text{NH}_3)_5 \text{ Br}] \t...
a. Write the IUPAC name of the following complex: $\text{K}[\text{Cr}(\text{H}_2\text{O})_2(\text{C}_2\text{O}_4)_2]\cdot\text{H}_2\text{O}$
b. Name the metal present in the complex compound of
(i) Haemoglobin (ii) Vitamin B-12
In which of the above test tubes; A, B or C: (i) Violet vapours will be formed (ii) The bubbles of gas evolved will extinguish a burning matchstick. Write an equation for each of the above observations. b. A metal ion $M^{n+}$ of the first transition series having $d^5$ configuration combines with t...
Which of the following is the most stable complex species ?
(A) $[\text{Fe}(\text{CN})_6]^{3-}$
(B) $[\text{Fe}(\text{CO})_5]$
(C) $[\text{Fe}(\text{C}_2\text{O}_4)_3]^{3-}$
(D) $[\text{Fe}(\text{H}_2\text{O})_6]^{3+}$
Assertion (A) : [Co(NH$_{3}$)$_{5}$SO$_{4}$]Cl gives a white precipitate with silver nitrate solution. Reason (R) : The complex dissociates to give Cl$^{-}$ and SO$_{4}^{2-}$ ions.
(a) Define the following terms : (i) Crystal field splitting energy (ii) Ambidentate ligand OR (b) What is meant by the chelate effect ? Give an example.
The type of isomerism shown by the complex $[ ext{CoCl}_2( ext{en})_2]^+$ is :
(A) Ionisation isomerism
(B) Geometrical isomerism
(C) Linkage isomerism
(D) Coordination isomerism
Which of the following is diamagnetic in nature ?
(A) $\text{Co}^{3+}$, octahedral complex with strong field ligand
(B) $\text{Co}^{3+}$, octahedral complex with weak field ligand
(C) $\text{Co}^{3+}$, in a square planar complex
(D) $\text{Co}^{3+}$, in a tetrahedral complex
[ Atomic number : $\text...
(c) Arrange the following complex ions in increasing order of their crystal field splitting energy ($\Delta_o$) : [Co(NH$_3$)$_6$]$^{3+}$, [CoF$_6$]$^{3-}$, [Co(CN)$_6$]$^{3-}$
(d) Write the hybridization and magnetic character of the complex [Ni(CO)$_4$] on the basis of valence bond theory. [Atomic No. : Ni = 28]
(e) Out of [CoF$_6$]$^{3-}$ and [Co(C$_2$O$_4$)$_3$]$^{3-}$, which one complex is : (i) more stable ? (ii) the high spin complex ?
(f) What is the difference between an ambidentate ligand and bidentate ligand ?
Which of the following ligands can show linkage isomerism in a coordination compound?
(A) $\text{NH}_3$
(B) $\text{SO}_4^{2-}$
(C) $\text{NO}_2^-$
(D) $\text{C}_2\text{O}_4^{2-}$
On adding $\text{AgNO}_3$ solution to 1 mole of complex $\text{NiCl}_2 \cdot 4\text{NH}_3$, two moles of $\text{AgCl}$ are formed. The secondary valency of $\text{Ni}$ in the complex will be :
(A) 4
(B) 2
(C) 3
(D) 6
Which of the following ligands is an ambidentate ligand?
(A) CO
(B) $\text{SCN}^-$
(C) $\text{NH}_3$
(D) $\text{H}_2\text{O}$
Attempt any five of the following : (a) Write the IUPAC name of the complex : $[ ext{Co}( ext{H}_2 ext{O})( ext{CN})( ext{en})_2]^{2+}$ (b) Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion ? (c)...
The most stable complex among the following is : (A) $\text{Na}_2[\text{Na}(\text{CN})_5(\text{NO})]$ (B) $\text{K}_3[\text{Fe}(\text{CN})_6]$ (C) $[\text{Cr}(\text{NH}_3)_6]^{3+}$ (D) $\text{Na}_2[\text{Ni}(\text{EDTA})]$
Considering the strength of the ligand, the lowest excitation energy will be observed in :
(A) $[\text{Co}(\text{H}_2
\text{O})_6]^{3+}$
(B) $[\text{Co}(\text{NH}_3)_6]^{3+}$
(C) $[\text{Co}(\text{CN})_6]^{3-}$
(D) $[\text{CoCl}_6]^{3-}$
(a) Draw the geometrical isomers of the complex [Mn(Br)$_2$(Cl)$_2$]$^{2-}$. (b) Give the electronic configuration of d$^4$ ion when $\Delta_o < P$. (c) Solution of [CoF$_6$]$^{3-}$ is coloured whereas [Ni(CN)$_4$]$^{2-}$ is colourless. Explain. [Atomic number : Co = 27, Ni = 28]
The geometry of paramagnetic nickel complex $[\text{NiCl}_4]^{2-}$ is :
(A) tetrahedral
(B) octahedral
(C) square planar
(D) distorted octahedral
The IUPAC name of the complex $[\text{Co}(\text{NH}_3)_5(\text{ONO})]\text{Cl}_2$ is :
(A) Pentaamminenitrito-O-cobalt(III) chloride
(B) Pentaamminenitrito-N-cobalt(III) chloride
(C) Pentaamminenitro-cobalt(III) chloride
(D) Pentaamminenitrito-cobalt(II) chloride
When 1 mole of $\text{CoCl}_3 . 5\text{NH}_3$ is treated with excess of $\text{AgNO}_3$, 2 moles of $\text{AgCl}$ are obtained. The secondary valency of $\text{Co}$ will be :
(A) 6
(B) 4
(C) 3
(D) 5
Assertion (A) : Linkage isomerism arises in coordination compounds containing ambidentate ligand. Reason (R) : Ambidentate ligand has two same donor atoms.
(a) Write the formulae of the following compounds : (i) Potassium tetrahydroxidozincate (II) (ii) Hexaammineplatinum (IV) chloride OR (b) Define the following terms : (i) Homoleptic complex (ii) Chelate ligand
Define Crystal field splitting energy. On the basis of Crystal field theory, write the electronic configuration of $\text{d}^5$ ion when : (a) $\Delta_o > P$ (b) $\Delta_o < P$
The formula of the complex dichloridobis (ethane -1, 2-diamine) platinum (IV) nitrate is
(a) $[\text{Pt Cl}_2(\text{en})_2 \text{ (NO}_3)_2]$
(b) $[\text{Pt Cl}_2(\text{en})_2] (\text{NO}_3)_2$
(c) $[\text{Pt Cl}_2(\text{en})_2 (\text{NO}_3)]\text{NO}_3$
(d) $[\text{Pt (en)}_2 (\text{NO}_3)_2]\text{...
The compounds [Co(SO$_4$) (NH$_3$)$_5$] Br and [Co(Br) (NH$_3$)$_5$] SO$_4$ represent :
(a) optical isomerism
(b) linkage isomerism
(c) ionisation isomerism
(d) coordination isomerism
(iii) Write the hybridization and magnetic behaviour of [Ni(CN)$_4$]$^{2-}$. [Atomic number : Ni = 28]
Assertion (A) : EDTA is used to determine hardness of water. Reason (R) : EDTA is a bidentate ligand.
(ii) What is the secondary valency of $[\text{Co(en)}_3]^{3+}$?
The compounds $\text{[Co(SO}_4\text{)(NH}_3\text{)}_5\text{] Br}$ and $\text{[Co(Br) (NH}_3\text{)}_5\text{] SO}_4$ represent :
(a) optical isomerism
(b) linkage isomerism
(c) ionisation isomerism
(d) coordination isomerism
OR
(iii) Write the hybridization and magnetic behaviour of [Ni(CN)$_{4}$]$^{2-}$. [Atomic number : Ni = 28]
(a) Write the formula for the following coordination compound
Bis(ethane-1,2-diamine) dihydroxidochromium(III) chloride
(b) Does ionization isomer for the following compound exist? Justify your answer.
$\text{Hg}[\text{Co}(\text{SCN})_4]$
(c) Is the central metal atom in coordination complexes a Lew...
Crystal field splitting by various ligands
Metal complexes show different colours due to d-d transitions. The complex absorbs light of specific wavelength to promote the electron from $\text{t}_{2\text{g}}$ to $\text{eg}$ level. The colour of the complex is due to the transmitted light, which is co...
Answer the following questions: (a) Out of the ligands "A", "B", "C" and "D", which ligand causes maximum crystal field splitting? Why? OR Which of the two, "A" or "D" will be a weak field ligand? Why? (b) Which of the complexes will be violet in colour? $[ ext{CrA}_6]^{3-}$ or $[ ext{CrB}_6]^{3+}$ ...
What is the secondary valency of Cobalt in $[\text{Co}(\text{en})_2\text{Cl}_2]^+$?
(a) 6
(b) 4
(c) 2
(d) 8
The formula of the complex dichloridobis (ethane-1, 2-diamine) platinum (IV) nitrate is
(a) [Pt $Cl_2$(en)$_2$ (NO$_3$)$_2$]
(b) [Pt $Cl_2$(en)$_2$] (NO$_3$)$_2$
(c) [Pt $Cl_2$(en)$_2$ (NO$_3$)]NO$_3$
(d) [Pt (en)$_2$ (NO$_3$)$_2$]$Cl_2$
(a) Write the IUPAC names of the following : (i) $[\text{Co}(\text{NH}_3)_5(\text{ONO})]^{2+}$ (ii) $\text{K}_2[\text{NiCl}_4]$ OR (b) (i) What is a chelate complex ? Give one example. (ii) What are heteroleptic complexes ? Give one example.
Which of the following ligands is an ambidentate ligand? (a) CO (b) $\text{NO}_2$ (c) $\text{NH}_3$ (d) $\text{H}_2\text{O}$
The formula of the complex Iron (III) hexacyanidoferrate (II) is :
(a) $\text{Fe}_2 [\text{Fe}(\text{CN})_6]_3$
(b) $\text{Fe}_4 [\text{Fe}(\text{CN})_6]_3$
(c) $\text{Fe} [\text{Fe}(\text{CN})_6]$
(d) $\text{Fe}_3 [\text{Fe}(\text{CN})_6]_2$
(b) (i) What is a chelate complex ? Give one example. (ii) What are heteroleptic complexes ? Give one example.
(a) Draw the geometrical isomers of [Co(en)_{2}Cl_{2}]^{2+}. Which geometrical isomer of [Co(en)_{2}Cl_{2}]^{2+} is not optically active and why ?
(b) Write the hybridisation and magnetic behaviour of [CoF_{6}]^{3-}.
[Given : Atomic number of Co = 27]
The coordination number of Ag in $[\text{Ag}(\text{NH}_3)_2]\text{Cl}$ is:
(a) 3
(b) 1
(c) 2
(d) 4
Amongst the following, the most stable complex is : (a) $[\text{Fe}(\text{C}_2\text{O}_4)_3]^{3-}$ (b) $[\text{FeCl}_6]^{3-}$ (c) $[\text{Fe}(\text{H}_2\text{O})_6]^{3+}$ (d) $[\text{Fe}(\text{NH}_3)_6]^{3+}$
(a) Using IUPAC norms, write the systematic names of the following complexes : (i) $\text{K}_3[\text{Fe}(\text{CN})_6]$ (ii) $[\text{Co}(\text{en})_2\text{Cl}_2]^+$ OR (b) Write the role of coordination compounds with an example in each of the following : (i) Biological system (ii) Extraction of met...
(a) What is a ‘chelate complex’ ? Give an example. (b) Write the hybridisation and magnetic character of $[ ext{FeF}_6]^{3-}$. [Atomic number : Fe = 26] (c) What type of isomerism is shown by the coordination compound $[ ext{Cr}( ext{H}_2 ext{O})_5 ext{Br}] ext{SO}_4$ ?
Which of the following species is not expected to be a ligand ? (a) $\text{CO}$ (b) $\text{NH}_4^+$ (c) $\text{NH}_3$ (d) $\text{H}_2\text{O}$
Which of the following is the most stable complex species ? (a) $[\text{Fe}(\text{C}_2\text{O}_4)_3]^{3-}$ (b) $[\text{Fe}(\text{CN})_6]^{3-}$ (c) $[\text{Fe}(\text{CO})_5]$ (d) $[\text{Fe}(\text{H}_2\text{O})_6]^{3+}$
OR
Give reasons :
(1) Low spin tetrahedral complexes are not formed.
(2) $[\text{Co}(\text{NH}_3)_6]^{3+}$ is an inner orbital complex whereas $[\text{Ni}(\text{NH}_3)_6]^{2+}$ is an outer orbital complex.
[Atomic number : $\text{Co} = 27$, $\text{Ni} = 28$]
Which of the following complexes is a 'chelate' complex ? (a) $[\text{Co}(\text{NH}_3)_6]^{3+}$ (b) $[\text{Co}(\text{en})_3]^{3+}$ (c) $[\text{Co}(\text{NH}_3)_4\text{Cl}_2]^+$ (d) $[\text{CoF}_6]^{3-}$
Optical isomerism is not shown by the complex : (a) $[\text{Co}(\text{en})_2\text{Cl}_2]^+$ (trans form) (b) $[\text{Co}(\text{en})_2\text{Cl}_2]^+$ (cis form) (c) $[\text{Cr}(\text{ox})_3]^{3-}$ (d) $[\text{Cr}(\text{en})_3]^{3+}$
Which of the following is a polydentate ligand ?
(a) $\text{NH}_3$
(b) $\text{H}_2\text{N} - \text{CH}_2 - \text{CH}_2 - \text{NH}_2$
(c) $\text{EDTA}^{4-}$
(d) $\text{C}_2\text{O}_4^{2-}$
Which of the following coordination compounds exhibits linkage isomerism ?
(a) $[\text{Co}(\text{NH}_3)_3\text{Cl}_3]$
(b) $[\text{Co}(\text{NH}_3)_5(\text{CO}_3)]\text{Cl}$
(c) $[\text{Co}(\text{NH}_3)_5\text{NO}_2](\text{NO}_3)_2$
(d) $[\text{Co}(\text{en})_3]\text{Cl}_3$
Coordination compounds are widely present in the minerals, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems and medicine. Alfred Werner's theory postulated the use of two types of linkages (primary and secondar...
In which of the following does the central atom exhibit an oxidation state of +3 ? (a) $\text{K}_2[\text{Ni}(\text{CN})_4]$ (b) $\text{K}_4[\text{Fe}(\text{CN})_6]$ (c) $[\text{Fe}(\text{C}_2\text{O}_4)_3]^{3-}$ (d) $[\text{Cu}(\text{NH}_3)_4]^{2+}$
What type of isomerism is shown by the following pair of complex compounds? [Co(NH$_{3}$)$_{6}$] [Cr(CN)$_{6}$] and [Cr(NH$_{3}$)$_{6}$] [Co(CN)$_{6}$] (a) Linkage isomerism (b) Hydrate isomerism (c) Coordination isomerism (d) Ionization isomerism
In which of the following does the central atom exhibit an oxidation state of +4 ? (a) $\text{K}_2[\text{Ni}(\text{CN})_4]$ (b) $[\text{Cu}(\text{NH}_3)_4]^{2+}$ (c) $[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$ (d) $[\text{Pt}(\text{en})_2\text{Cl}_2]^{2+}$
Answer any three of the following questions : (a) Explain the type of hybridization in [Fe(CN)$_6$]$^{3-}$ on the basis of valence bond theory. (Given : Atomic number of Fe = 26) (b) Draw the geometrical isomers of [PtCl$_2$(en)$_2$]$^{2+}$ ion. (c) [NiCl$_4$]$^{2-}$ is paramagnetic while [Ni(CO)$_4...
The crystal field splitting energy in tetrahedral crystal field ($\Delta_t$) is equal to :
(a) $\frac{4}{9}\Delta_o$
(b) $\frac{9}{4}\Delta_o$
(c) $\frac{4}{3}\Delta_o$
(d) $2\Delta_o$
Assertion (A) : Trans $[\text{Cr } \text{Cl}_2(\text{ox})_2]^{3-}$ shows optical isomerism. Reason (R) : Optical isomerism is common in octahedral complexes involving didentate ligands.
(a) On the basis of crystal field theory write the electronic configuration for $d^5$ ion with a strong field ligand for which $\Delta_0 > \text{P}$. (b) $[\text{Ni(CO)}_4]$ has tetrahedral geometry while $[\text{Ni(CN)}_4]^{2-}$ has square planar yet both exhibit dimagnetism. Explain. [Atomic numbe...
Assertion (A) : EDTA is a hexadentate ligand.
Reason (R) : EDTA has 2 nitrogen and 4 oxygen donor atoms.
(a) On the basis of crystal field theory write the electronic configuration for $\text{d}^5$ ion with a weak ligand for which $\Delta_0 < \text{P}$. (b) Explain $[\text{Fe(CN)}_6]^{3-}$ is an inner orbital complex whereas $[\text{FeF}_6]^{3-}$ is an outer orbital complex. [Atomic number : Fe = 26]
Assertion (A) : Order of reaction is applicable to elementary as well as complex reactions.
Reason (R) : For a complex reaction molecularity has no meaning.
Using valence bond theory, predict : (a) Hybridisation of central metal atom of the complex [Co(NH$_{3}$)$_{6}$]$^{3+}$. (b) Its shape and magnetic behaviour. (c) Whether it is a high spin or a low spin complex. [Atomic number : Co = 27]
(a) Why is $[\text{Ti}(\text{H}_2\text{O})_6]^{3+}$ coloured ?
(b) Write IUPAC name of the given complex :
$\text{K}_3[\text{Cr}(\text{C}_2\text{O}_4)_3]$
Which type of isomerism is exhibited by the given complex ?
$[ ext{Pt}( ext{NH}_3)_2 ext{Cl}_2]$
(a) Optical isomerism (b) Geometrical isomerism
(c) Ionisation isomerism (d) Coordination isomerism
Write IUPAC name of the given complex :
[Co(NH$_3$)$_5$Cl]Cl$_2$
What is the secondary valency of Co in this complex?
Using valence bond theory, predict :
(a) Hybridisation of central metal atom of the complex $[ ext{Co}( ext{NH}_3)_6]^{3+}$.
(b) Its shape and magnetic behaviour.
(c) Whether it is a high spin or a low spin complex.
[Atomic number : Co = 27]
Which type of isomerism is shown by the given complex ? [Co(en)_3]^{3+}
(a) Coordination isomerism
(b) Optical isomerism
(c) Linkage isomerism
(d) Ionisation isomerism
Oxidation state of central metal atom in the given complex is : [Co(NH_3)_4(H_2O)_2]Cl_3
(a) + 2
(b) + 3
(c) + 1
(d) + 4
(a) Why is $\text{ZnSO}_4$ salt white in colour?
(b) Write IUPAC name of the given complex :
$\text{K}_2[\text{Ni}(\text{CN})_4]$
Using valence bond theory, predict : (a) Hybridisation of central metal atom of the complex $[\text{Co}(\text{NH}_3)_6]^{3+}$. (b) Its shape and magnetic behaviour. (c) Whether it is a high spin or a low spin complex. [Atomic number : $\text{Co} = 27$]
Which of the following ligands is an ambidentate ligand ?
(a) $\text{OH}^-$
(b) $\text{NH}_3$
(c) $\text{CO}$
(d) $\text{NO}_2^-$
How many hydrate isomers are possible of the complex with the formula $\text{CrCl}_3 \cdot 6\text{H}_2\text{O}$?
(a) Six
(b) Four
(c) Three
(d) Two
Assertion (A) : Hydrolysis of an ester in acidic medium is a second order reaction.
Reason (R) : For a complex reaction, order is given by the slowest step.
(a) Write the IUPAC names of the following coordination compounds : (i) $[\text{CoBr}_2(\text{en})_2]^+$ (ii) $\text{K}_3[\text{Co}(\text{C}_2\text{O}_4)_3]$ OR (b) What is spectrochemical series ? What is the difference between a strong field ligand and a weak field ligand ?
(a) Write the hybridisation and magnetic character of the following complexes : (i) $[\text{Fe}(\text{CN})_6]^{4-}$ (ii) $[ ext{CoF}_6]^{3-}$ (iii) $[ ext{Ni}( ext{CO})_4]$ [Atomic number : $\text{Fe} = 26, \text{Co} = 27, \text{Ni} = 28$] OR (b) (i) Write the electronic configuration of $\text{Fe}^...
(a) (i) On the basis of crystal field theory, write the electronic configuration for d^4 ion if Δ_0 < P.
(ii) Using valence bond theory, predict the hybridization and magnetic character of [Ni(CN)_4]^{2-}.
(Atomic number of Ni = 28)
(iii) Write the formula of the following complex using IUPAC norms ...
(a) (i) On the basis of crystal field theory, write the electronic configuration for $\text{d}^4$ ion if $\Delta_0 < \text{P}$.
(ii) Using valence bond theory, predict the hybridization and magnetic character of $[\text{Ni}(\text{CN})_4]^{2-}$.
(Atomic number of $\text{Ni} = 28$)
(iii) Write the for...
OR
(b) When a co-ordination compound $\text{NiCl}_2 \cdot 6\text{H}_2\text{O}$ mixed with $\text{AgNO}_3$, 2 moles of $\text{AgCl}$ are precipitated per mole of the compound. Write
(i) Structural formula of the complex.
(ii) Secondary valency of '$\text{Ni}$' in the complex.
(iii) IUPAC name of the ...
What do you mean by complex reactions ? Can we determine order and molecularity of a complex reaction ?
(i) On the basis of crystal field theory, write the electronic configuration for $d^4$ ion if $\Delta_0 < \text{P}$.
(ii) Using valence bond theory, predict the hybridization and magnetic character of $[\text{Ni}(\text{CN})_4]^{2-}$.
(Atomic number of $\text{Ni} = 28$)
(iii) Write the formula of the...
When a co-ordination compound $\text{NiCl}_2 \cdot 6\text{H}_2\text{O}$ mixed with $\text{AgNO}_3$, 2 moles of $\text{AgCl}$ are precipitated per mole of the compound. Write
(i) Structural formula of the complex.
(ii) Secondary valency of 'Ni' in the complex.
(iii) IUPAC name of the complex.
(a) Write the hybridisation and magnetic character of the following complexes :
(i) $[ ext{NiCl}_4]^{2-}$
(ii) $[ ext{Co}( ext{NH}_3)_6]^{3+}$
(iii) $[ ext{FeF}_6]^{3-}$
[Atomic number : $ ext{Ni} = 28$, $ ext{Co} = 27$, $ ext{Fe} = 26$]
OR
(b) (i) Write the IUPAC name of the following complex :
$[ ...
(a) Write the hybridisation and magnetic character of the following complexes :
(i) $[ ext{NiCl}_4]^{2-}$
(ii) $[ ext{Co}( ext{NH}_3)_6]^{3+}$
(iii) $[ ext{FeF}_6]^{3-}$
[Atomic number : $ ext{Ni} = 28, \text{ Co} = 27, \text{ Fe} = 26$]
OR
(b) (i) Write the IUPAC name of the following complex...
Using Valence bond theory, explain the following in relation to the paramagnetic complex $[\text{Mn}(\text{CN})_6]^{3-}$ a. type of hybridization b. magnetic moment value c. type of complex - inner, outer orbital complex
OR (b) (i) Write the IUPAC name of the following complex : $[ ext{Co}( ext{NH}_3)_4( ext{H}_2 ext{O}) ext{Cl}] ext{Cl}_2$ (ii) What is the difference between an Ambidentate ligand and a Bidentate ligand ? (iii) Out of $[ ext{Fe}( ext{NH}_3)_6]^{3+}$ and $[ ext{Fe}( ext{C}_2 ext{O}_4)_3]^{3-}$, which...
Using valence bond theory, predict the hybridization and magnetic character of the complex : $[Ni(CO)_4]$ (Atomic number : $Ni = 28$)
Write IUPAC name of $[Pt(NH_3)_2Cl(NO_2)]$.
Why $[Co(en)_3]^{3+}$ is a more stable complex than $[Co(NH_3)_6]^{3+}$ ?
(a) (i) Write the electronic configuration of $d^5$ on the basis of crystal field splitting theory if $\Delta_o < P$.
(ii) $[\text{Fe}(\text{CN})_6]^{3-}$ is weakly paramagnetic whereas $[\text{Fe}(\text{CN})_6]^{4-}$ is diamagnetic. Give reason to support this statement. [Atomic no. : Fe = 26]
(iii...
OR
(b) (i) Calculate the spin only magnetic moment of the complex $[\text{CoF}_6]^{3-}$. (Atomic no. of Co = 27)
(ii) Write the IUPAC name of the given complex :
$[\text{CrCl}_2(\text{H}_2\text{O})_4]\text{Cl}$
(iii) Which out of the two complexes is more stable and why?
$[\text{Fe}(\text{H}_2\text{...
(a) (i) Write the electronic configuration of $\text{d}^4$ on the basis of crystal field splitting theory, if $\Delta_0 < \text{P}$.
(ii) $[\text{Ni}(\text{CN})_4]^{2-}$ with square-planar structure is diamagnetic and $[\text{NiCl}_4]^{2-}$ with tetrahedral geometry is paramagnetic. Give reason to s...
OR
(b) (i) Calculate the spin only magnetic moment of the complex $[\text{FeF}_6]^{3-}$. (Atomic number of $\text{Fe} = 26$)
(ii) Write the IUPAC name of the given complex :
$[\text{Co}(\text{NH}_3)_5\text{Cl}]\text{Cl}_2$
(iii) Why is the complex $[\text{Co}(\text{en})_3]^{3+}$ more stable than $[\...
(i) Write the electronic configuration of $d^4$ on the basis of crystal field splitting theory if $\Delta_o > P$. (ii) $[\text{Co}(\text{NH}_3)_6]^{3+}$ is an inner orbital complex whereas $[\text{Ni}(\text{NH}_3)_6]^{2+}$ is an outer orbital complex. (Atomic number : Co = 27, Ni = 28) (iii) Write t...
(i) Calculate the spin only magnetic moment of the complex $[\text{Fe}(\text{H}_2\text{O})_6]^{2+}$. (Atomic number of Fe = 26) (ii) Which out of the following two complexes is more stable and why? $[\text{CoF}_6]^{3-}$, $[\text{Co}(\text{C}_2\text{O}_4)_3]^{3-}$ (iii) Write the IUPAC name of the gi...
(a) (i) Write the IUPAC name of the following complex : $\text{K}_2[\text{PdCl}_4]$ (ii) Using crystal field theory, write the electronic configuration of $d^5$ ion, if $\Delta_0 > P$. (iii) What are Homoleptic complexes? OR (b) (i) Why chelate complexes are more stable than complexes with unidentat...
(a) (i) Write the IUPAC name of the following complex: [Pt(NH$_3$)$_6$]Cl$_4$
(ii) On the basis of crystal field theory, write the electronic configuration of d$^4$ ion, if $\Delta_0 < P$.
(iii) What are Heteroleptic complexes?
OR
(b) (i) Using IUPAC norms write the formulas for the following:
(i.i)...
(a) Write the IUPAC name of the following complex :
$ ext{K}_3[ ext{Cr}( ext{C}_2 ext{O}_4)_3]$
(b) On the basis of crystal field theory, write the electronic configuration of $d^5$ ion if $\Delta_0 < P$.
(c) What are ambidentate ligands ?
(a) (i) Define the following terms with an example : (I) Ambidentate ligand (II) Chelate effect (ii) Write the formula of the following complex : Hexaammineplatinum(II)chloride OR (b) (i) Write the hybridization and geometry of [Ni(CN)_4]^{2-}. (Atomic number of Ni = 28) (ii) Write the IUPAC name of...
(a) Write the hybridization and magnetic character of the following complexes on the basis of valence bond theory :
(i) $[ ext{FeF}_6]^{3-}$
(ii) $[ ext{Co(ox)}_3]^{3-}$
[Atomic number : Fe = 26, Co = 27]
(b) Write the formula of the following complex :
Hexaamminecobalt(III)chloride