CBSE Questions for Class 12 Engineering Chemistry Coordination Compounds Quiz 12 - MCQExams.com

The most stable complex among the following is:
  • $$[Pd(CN)_4]^{4-}$$
  • $$[Fe(CO)_5]$$
  • $$[Ni(CN)_4]^{4-}$$
  • $$[Ni(CN)_4]^{3-}$$
Which of the following has longest C-O bond length? (Free C-O bond length CO is $$1.128\overset{o}{A}$$).
  • $$[Mn(CO)_6]^+$$
  • $$[Ni(CO)_4]$$
  • $$[Co(CO)_4]^{\circleddash}$$
  • $$[Fe(CO)_4]^{2-}$$
The incorrect statement about compound mercury tetrathiocyanatocobaltate(III)
  • It cannot show structure isomerism
  • Compound is octaherdral
  • The formula of compound is $$Hg[Co(SCN)_4]$$
  • Coordination number of $$Co$$ is $$4$$
A complex of iron and cynide is $$100 \%$$ ionised at $$1 m$$ if its elevation in boiling point is $$2.08^{o}$$ ($${K_b}=0.52^{o}mol/kg$$) then the complex is:
  • $${K_3}[{Fe(C{N)_6}}]$$
  • $$Fe{(CN)_2}$$
  • $${K_4}[{Fe(C{N)_6}}]$$
  • $$Fe{(CN)_4}$$
The total number of possible isomers for the square planar $$[Pt(Cl)(NO_2)(NO_3)(SCN)]^{2-}$$ is :
  • $$12$$
  • $$8$$
  • $$16$$
  • $$24$$
Which of the following complexes is/are expected to exhibit isomerism?
  • $$[Pt(NH_{3})_{2}Cl_{2}]$$
  • $$[Ni(NH_{3})_{2}Cl_{2}]$$
  • $$[Ni(en)_{3}]^{2+}$$
  • $$[Ni(NH_{3})_{4}(H_{2}O)_{2}]^{2+}$$
Which is the following complex shown optical activity?
  • $$trans-\left[ CO\left( ox \right) _{ 2 }{ Cl }_{ 2 } \right] ^{ 3- }$$
  • $$\left[ CO\left( NH_{ 3 } \right) _{ 3 }{ Cl }_{ 3 } \right] $$
  • $$\left[ Fe\left( edta \right) \right] ^{ \_ }$$
  • $$cis-\left[ Pt\left( NH_{ 3 } \right) _{ 2 }{ Cl }_{ 2 } \right] $$
The total number of possible isomer for the complex complex:-$$[Cu(NH_{3})_{4}][PtCl_{4}]$$
  • 3
  • 6
  • 5
  • 4
The metal d-orbitals that are directly facing the ligands in $$K_{3}[Co(CN)_{6}]$$ are:
  • $$d_{xz}, d_{yz}$$ and $$d_{z^{2}}$$
  • $$d_{xy}, d_{xz}$$ and $$d_{yz}$$
  • $$d_{xy}$$ and $$d_{x^{2} - y^{2}}$$
  • $$d_{x^{2} - y^{2}}$$ and $$d_{z^{2}}$$
The number of isomers of $$ [Co(NH_3)_3Cl_3] $$ complex and the secondary valency of the metal ion in the complex, respectively, are:
  • $$3$$ & $$3$$
  • $$2$$ & $$3$$
  • $$2$$ & $$6$$
  • $$3$$ & $$6$$
The number of ions produced by potassium ferric cyanide in solution is:
  • 2
  • 3
  • 4
  • 5
For complexes : (i) $$CoCl_{3}, 6NH_{3}$$ (ii) $$CoCl_{3}. 5NH_{3}$$ (iii) $$CoCl_{3}. 4NH_{3}$$ primary valency in I, II and III are respectively.
  • $$6, 5, 4$$
  • $$3, 2, 1$$
  • $$0, 1, 2$$
  • $$3, 3, 3$$
Select the correct statement(s) about "Ziese's salt'', $$K[PtCl_{3}(\eta^ {2}-C_{2}H_{4})]$$.
  • It has only two types of $$M-Cl$$ bond length
  • $$E.A.N=84$$
  • It is a $$\pi-$$bonded organometallic compound
  • All of these
In the following reaction the major complex product is $$[PtCl_{4}]^{2-}+2NH_{3}\rightarrow\ [PtCl_{2}(NH_{3})_{2}]+2Cl^{-}$$
  • cis
  • trans
  • anyone
  • can't be predicted
Number of ions present in $$K_{4}[Fe(CN)_{6}]$$
  • $$2$$
  • $$10$$
  • $$3$$
  • $$5$$
The primary valency of iron in $${{\text{K}}_{\text{4}}}\left[ {{\text{Fe}}{{\left( {{\text{CN}}} \right)}_{\text{6}}}} \right]$$ is 
  • 1
  • 2
  • 3
  • 4
Consider the following two complex ions: $${[Co{F}_{6}]}^{3-}$$ and $${ \left[ Co{ \left( { C }_{ 2 }{ O }_{ 4 } \right)  }_{ 3 } \right]  }^{ 3- }$$. Which of the following statement(s) is/are false?
  • Both are octahedral
  • $${ \left[ Co{ \left( { C }_{ 2 }{ O }_{ 4 } \right) }_{ 3 } \right] }^{ 3- }$$ is diamagnetic while $${[Co{F}_{6}]}^{3-}$$ is paramagnetic
  • Both are outer orbitals complexes
  • In both the complexes, the central metal is in the same oxidation state
Which of the following statement is wrong:
  • Hybridisation is the mixing of atomic orbitals prior to their combining into molecular orbitals
  • $$sp^2$$ hybrid orbital are formed from two p atomic orbitals and one s atomic orbital
  • $$dsp^2$$ hybrid orbitals are all at $$90^o$$ to one another
  • $$sp^3d^2$$ hybrid orbitals are directed towards the corners of a regular tetrahedron
What are the hybridization of $$Ni$$ and geometry of molecule $${ K }_{ 4 }[Ni{ (CN) }_{ 4 }]$$?
  • $${ sp }^{ 3 }$$, square planar
  • $${ dsp }^{ 2 }$$, tetrahedral
  • $${ sp }^{ 3 }$$, tetrahedral
  • $${ dsp }^{ 2 }$$, square planar
The formula of the complex hydridotrimethoxoborate (III) ion is:
  • $$[BH(OCH_{3})_{3}]^{-2}$$
  • $$[BH_{2}(OCH_{3})_{3}]^{-2}$$
  • $$[BH(OCH_{3})_{3}]^{-}$$
  • $$[BH(OCH_{3})_{3}]^{+}$$
Primary and secondary valency of Pt in $$\left[ Pt{ \left( en \right)  }_{ 2 }{ Cl }_{ 2 } \right] { Cl }_{ 2 }$$ are respectively
  • $$4,4$$
  • $$4,6$$
  • $$6,4$$
  • $$2,6$$
How many ions are produced in aqueous solution of $$\left[ Co\left( { H }_{ 2 }O \right) _{ 6 } \right] { Cl }_{ 2 }$$?
  • 2
  • 3
  • 4
  • 6
$$A+B$$$$\rightleftharpoons$$$$C+D$$ if initially the concntration of A and B are both equal but at equilibium concentration of D will twice that of A, then what will be the equilibium constant of the reaction?
  • 1
  • 2
  • 3
  • 4
What is the configuration of $$ Cr^{+3} $$ according to C.F.T. in aqueous medium?
  • $$ t^2_{2g}e^1_g $$
  • $$ t^3_{2g}e^0_g $$
  • $$ t^1_{2g}e^2_g $$
  • $$ t^0_{2g}e^3_g $$
Calculate the oxidation number of $$ Fe$$ in $${ Fe }_{ 4 }\left[ Fe\left( CN \right) _{ 6 } \right] _{ 3 }$$ 
  • +3, +2
  • +3, +3
  • +2, +2
  • +4, +3
Magnetic moment (spin only) of an octahedron complex having CFSE $$= - 0.8 \Delta _ { 0 }$$ and surrounded by weak field ligands can be: 
  • $$\sqrt { 15 }\ \mathrm { BM }$$
  • $$\sqrt { 8 }\ \mathrm { BM }$$
  • (a) $$\&$$ (b) both
  • None of these
What type of bond is $$L \rightarrow M$$ in complex compounds?
  • Ionic
  • Metallic
  • Co-ordinate covalent
  • Covalent
In $${ K }_{ 4 }\left[ { Fe\left( CN \right)  }_{ 6 } \right] ,$$ the E.AN. of $$Fe$$ is:
  • 33
  • 35
  • 36
  • 26
What type of hybridization is possible in square planar molecules?
  • $$sp^3$$
  • $$dsp^2$$
  • $$sp^3d$$
  • $$dsp^3$$
Alfred warner prepared many new compound by mixture of _______ and ammonia.
  • Iron chloride
  • Cobalt chloride
  • Maganese chloride
  • Chromium chloride
The number of possible isomers for disubstituted borazine $$B_{3}N_{3}H_{4}X_{2}$$  is 
  • 3
  • 4
  • 6
  • 2
Which of the following is true about metal-EDTA complex (if it is a $$3 d$$ metal)?
  • The ratio of moles of metal $$\&$$ EDTA in complex is $$1:6$$.
  • The ratio of moles of metal $$\&$$ EDTA in complex is $$6 : 1$$.
  • The ratio of moles of metal $$\&$$ EDTA in complex is $$1 : 1$$.
  • 3$$ { d }$$ metal ion cannot bonded with EDTA.
The Effective atomic number of Cr in  $$Cr(CO)_{6}$$ is 
  • 36
  • 38
  • 28
  • 54
The oxidation state of Cr in $$Cr(CO)_{ 6 }$$ is:
  • 0
  • +2
  • -2
  • +6
The oxidation state of nickel in $$[Ni(CO)_4]$$ is:
  • 4
  • 0
  • 2
  • 3
What is the primary and secondary valence of chromium ion complex compound dichloride oxaletochromium (II)
  • 2, 4
  • 4, 3
  • 3, 6
  • 6, 3
The value of 'x' in complex $${ H }_{ x }\left[ Co\left( { Co } \right) _{ 4 } \right] ,\left[ Fe\left( Co \right) _{ x }\left( \pi -{ C }_{ 5 }{ H }_{ 5 } \right)  \right] ^{ + }$$ are respectively
  • $$1,1$$
  • $$2,3$$
  • $$3,1$$
  • $$1,3$$
The charge on cobalt in $${ [Co{ (CN) }_{ 6 }] }^{ -3 }$$ is:
  • + 6
  • + 3
  • + 2
  • + 1
The crystal field splitting for $${ Cr }^{ 3+ }$$ ion in octahedral field changes for following ligands in decreasing order as:-
  • $${ I }^{ - }<{ H }_{ 2 }O<{ NH }_{ 3 }<{ CN }^{ - }$$
  • $$CN^{ - }{ >I }^{ - }>{ H }_{ 2 }O{ >NH }_{ 3 }$$
  • $$CN^{ - }>EDT{ A }^{ -4 }>{ S }^{ -2 }>{ Cl }^{ - }$$
  • $$CO>{ CN }^{ - }>{ I }^{ - }$$
Which of the following does not show optical activity?
  • $$\left[ CO\left( { NH }_{ 3 } \right) _{ 4 }{ Cl }_{ 2 } \right] $$
  • $$\left[ Cr\left( ox \right) _{ 3 } \right] ^{ 3- }$$
  • $$\left[ CO\left( ox \right) _{ 2 }\left( { NH }_{ 3 } \right) _{ 2 } \right] Cl$$
  • $$\left[ CO\left( en \right) \left( { NH }_{ 3 } \right) _{ 2 }\left( { H }_{ 2 }O \right) _{ 2 } \right] { Cl }_{ 2 }$$
Aqueous solution of which species shows highest molar conductivity?
  • $$ K_3[Co(C_2O_4)_3] $$
  • $$ [Pt(H_2O)_6]Br_4 $$
  • $$ [Co(NH_3)_5(CO_3)]Cl $$
  • $$ [Pt(NH_3)_2Cl(NO_2)] $$
Which Of the following statements is incorrect ?
  • In $$\mathrm { K } _ { 3 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right]$$ the ligand has satisfied only the secondary valency of ferric ion.
  • In $$\mathrm { K } _ { 3 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { \mathrm { 6 } } \right]$$ the ligand has satisfied both primary and secondary valencies of ferric ion.
  • In $$\mathrm { K } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { \mathrm { 6 } } \right]$$ the ligand has satisfied both primary and secondary valencies of ferrous ion.
  • In $$\left[ C u \left( N H _ { 3 } \right)_4 ] S O _ { 4 }\right.$$ the ligand has satisfied only the secondary valency of copper.
Which of the following will give maximum number of isomers?
  • $$\left[ Co\left( { NH }_{ 3 } \right) _{ 4 } \right] { Cl }_{ 2 }$$
  • $$\left[ Ni\left( { NH }_{ 3 } \right) _{ 4 }\left( en \right) \right] ^{ 2+ }$$
  • $$\left[ Ni\left( en \right) _{ 2 }\left( { C }_{ 2 }{ O }_{ 4 } \right) \right] ^{ 2- }$$
  • $$\left[ Cr\left( { NH }_{ 3 } \right) _{ 4 }\left( SCN \right) _{ 2 } \right] ^{ + }$$
In which of the following pairs , the hybridisation of central atmos  is same but molecular geometry is not the same ? 
  • $${ SO }_{ 3 },{ CO }_{ 3 }^{ 2- }$$
  • $${ SO }_{ 3 }^{ 2- },{ NH }_{ 3 }$$
  • $${ PCl }_{ 5 },{ POCl }_{ 3 }$$
  • $${ XeF }_{ 2 },{ ICl }_{ 3 }$$
 The oxidation number of Ni in $$Na_{ 2 }[Ni(EDTA)]$$is 
  • +4
  • +6
  • +2
  • 0
The number of ions formed when $$[Cu(NH_3)_4] SO_4$$ is dissolved in water is:
  • 1
  • 2
  • 4
  • zero
The coordination number and oxidation state of metal M in complex $$ [M(NH_3)_3 Cl_2SO_4 ] $$ respectively are: 
  • 6 and +3
  • 5 and +2
  • 6 and +4
  • 5 and +3
$$ [Co(H_2O)_5NO_2](NO_3)_2 $$ can not show
  • linkage isomerism
  • hydrate isomerism
  • ionization isomerism
  • optical isomerism
What is the valency of Fe which does not ionize in $${ K }_{ 3 }[Fe({ OX }_{ 3 })]$$?
  • Three
  • Four
  • Six
  • One
According to postulates of Werner theory for an ordination compounds.
  • Primary valency is ionizable
  • Secondary valency is ionizable
  • Primary and secondary valencies are non-ionizable
  • Only primary valency is non-ionizable
0:0:1


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