CBSE Questions for Class 12 Engineering Chemistry Coordination Compounds Quiz 4 - MCQExams.com

What is the electronic configuration of elements of $$III$$ rd group
  • $$1{ s }^{ 2 },2{ s }^{ 2 }2p{ s }^{ 3 }$$
  • $$1{ s }^{ 2 },2{ s }^{ 2 }2{ p }^{ 6 },3{ s }^{ 2 }3{ p }^{ 1 }$$
  • $$1{ s }^{ 2 },2{ s }^{ 2 }2{ p }^{ 6 }$$
  • $$1{ s }^{ 2 },2{ s }^{ 2 }2{ p }^{ 6 },3{ s }^{ 1 }\quad $$
The compounds $$[Co(SO_4)(NH_3)_5]Br$$ and $$[Co(SO_4)(NH_3)_5]Cl$$ represents:
  • linkage isomerism
  • ionisation isomerism
  • coordination isomerism
  • no isomerism
TEL is a compound used as
  • antibiotic
  • antiseptic
  • antiknocking
  • None of these
The solubilities of carbonates decrease down the magnesium group due to decrease in
  • lattice energies of solids
  • hydration energies of carbon
  • inter ionic attraction
  • entropy of solution formation
Which of the following statements are correct?
I) $$CO$$ forms a complex with $$CuCl$$ in $$con. HCl$$
II) $$Ni$$ forms a volatile carbonyl compound with $$CO$$
III) $$CO$$ act as a lewis acid
(IV) $$CO$$ oxidizes $$Cu$$ to $$CuO$$
  • I and III
  • I and II
  • III and IV
  • I and IV
$$2.33$$g of compound X(empirical formula $$CoH_{12}N_4Cl_3)$$ upon treatment with excess $$AgNO_3$$ solution produces $$1.435$$g of a white precipitate. The primary and secondary valences of cobalt in compound X, respectively, are.
[Given : Atomic mass: $$Co=59, Cl=35.5, Ag=108$$].
  • $$3, 6$$
  • $$3, 4$$
  • $$2, 4$$
  • $$4, 3$$
Which can exist both as diastereoisomer and enantiomer?
  • $$[Pt(en)_{3}]^{4+}$$
  • $$[Pt(en)_{2}ClBr]^{2+}$$
  • $$[Ru(NH_{3})_{4}Cl_{2}]^{0}$$
  • $$[PtCl_{2}Br_{2}]^{0}$$
Barium ions, $$CN^-$$ and $$Co^{2+}$$ form an ionic complex. If that complex is supposed to be $$75\%$$ ionised in water with vant Hoff factor 'i' equal to four, then the coordination number of $$Co^{2+}$$ in the complex can be.
  • Six
  • Five
  • Four
  • Six and Four both
When one mole of each of the following complex is treated with an excess of $$AgNO_3$$.which will give maximum amount of $$AgCl$$?
  • $$[Co(NH_3)_6]Cl_3$$
  • $$[Co(NH_3)_5Cl]Cl_2$$
  • $$[Co(NH_3)Cl_2]Cl$$
  • $$[Co(NH_3)_3Cl_3]$$
Hexa ammine nickel (II) hexa nitro cobaltate (III) can be written as:
  • $$[Ni(NH_3)_6Co(NO_2)_6]$$
  • $$[Ni(NH_3)_6]_3[Co(NO_2)_6]_2$$
  • $$[Ni(NH_3)_6][Co(NO_2)_6]_2$$
  • $$[Ni(NH_3)_6(NO_2)_6]Co$$
Total no. of possible isomers for complex compound $$[Cu(NH_{3})_{4}][PtCl_{4}]$$ are:
  • 3
  • 2
  • 4
  • none of these
Indicate the incorrect statement:
  • Number of hybrid orbitals formed is equal to no. of atomic involved
  • $$2{p}_{x}$$ and $$2{p}_{y}$$ orbitals of carbon can be hybridized to yield two new more stable orbitals
  • Effective hybridisation is not possible with orbitals of widely different energies
  • The concept of hybridization has a greater significance in the $$VB$$ theory of localised orbitals than $$MO$$ theory.
A violet colour compound is formed in detection of $$S$$ in a compound:
  • $${ Na }_{ 4 }\left[ Fe{ \left( CN \right) }_{ 5 }NOS \right] $$
  • $${ Na }_{ 3 }\left[ Fe{ \left( CN \right) }_{ 5 }NOS \right] $$
  • $${ Na }_{ 2 }\left[ Fe{ \left( CN \right) }_{ 5 }NOS \right] $$
  • $${ Na }\left[ Fe{ \left( CN \right) }_{ 5 }NOS \right] $$
Which of the following complex has five unpaired electrons?
  • $$[Mn({ H }_{ 2 }{ O })_{ 6 }{ ] }^{ 2+ }$$
  • $$[Mn(CN)_{ 6 }{ ] }^{ 3- }$$
  • $$[{ CrCl }_{ 3 }({ H }_{ 2 }{ O }_{ 3 }]$$
  • $$[Ag({ NH }_{ 3 }{ ) }_{ 2 }{ ] }^{ + }$$
In which of the following pair of complexes, the experimental magnetic moment and the geometric shapes same?
  • $$K\left[ Mn{ O }_{ 4 } \right] $$ and $${ K }_{ 2 }\left[ Ni{ Cl }_{ 4 } \right] $$
  • $${ K }_{ 2 }\left[ Ni\left( CN \right) _{ 4 } \right] $$ and $${ K }_{ 4 }\left[ Ni\left( CN \right) _{ 4 } \right] $$
  • $${ K }_{ 2 }\left[ Ni\left( CN \right) _{ 4 } \right] $$ and $${K}_2\left[ Ni{ \left( { NH }_{ 3 } \right) }_{ 2 }{ Cl }_{ 2 } \right] $$
  • $${ K }_{ 3 }\left[ Fe\left( CN \right) _{ 6 } \right] $$ and $${ K }_{ 4 }\left[ Fe\left( CN \right) _{ 6 } \right] $$
Which of the following will give maximum number of isomer?
  • $${ \left[ Co{ \left( py \right) }_{ 3 }{ \left( { NH }_{ 3 } \right) }_{ 3 } \right] }^{ 3+ }$$
  • $${ \left[ Ni(en){ \left( { NH }_{ 3 } \right) }_{ 4 } \right] }^{ 2+ }$$
  • $${ \left[ Fe{ \left( { C }_{ 2 }{ O }_{ 4 } \right) }_{ }{ \left( en \right) }_{ 2 } \right] }^{ 2- }$$
  • $${ \left[ Co{ \left( { NO }_{ 2 } \right) }_{ 2 }{ \left( { NH }_{ 3 } \right) }_{ 4 } \right] }^{ + }$$
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers:
  • $$K\left[ Cr({ H }_{ 2 }{ O })_{ 2 }({ C }_{ 2 }{ O }_{ 4 })_{ 2 } \right]$$
  • $$\left[ Co({ en }{ ) }_{ 3 } \right] { Cl }_{ 3 }$$
  • $$\left[ Co({ NH }_{ 3 }{ ) }_{ 5 }\left( { NO }_{ 2 } \right) \right] ({ NO_{ 3 }) }_{ 2 }$$
  • $$\left[ Pt({ NH }_{ 3 })({ H }_{ 2 }{ O }){ Cl }_{ 2 } \right]$$
Which of the following pairs of complexes whose aqueous solutions gives pale yellow and white precipitates respectively with $$0.1M$$ $$Ag{NO}_{3}$$?
  • $$\left[ Pt{ \left( { NH }_{ 3 } \right) }_{ 4 }{ Br }_{ 2 } \right] { Cl }_{ 2 }$$ and $$\left[ Pt{ \left( { NH }_{ 3 } \right) }_{ 4 }{ Cl }_{ 2 } \right] { Br }_{ 2 }$$
  • $$\left[ Co{ \left( { NH }_{ 3 } \right) }_{ 5 }{ NO }_{ 3 } \right] Br$$ and $$\left[ Co{ \left( { NH }_{ 3 } \right) }_{ 5 }Br \right] { NO }_{ 3 }\quad $$
  • $$\left[ Pt{ \left( { NH }_{ 3 } \right) }_{ 4 }{ Cl }_{ 2 } \right] { Br }_{ 2 }$$ and $$\left[ Pt{ \left( { NH }_{ 3 } \right) }_{ 4 }{ Br }_{ 2 } \right] { Cl }_{ 2 }\quad $$
  • $$\left[ Co{ \left( { NH }_{ 3 } \right) }_{ 5 }{ NO }_{ 3 } \right] Cl$$ and $$\left[ Co{ \left( { NH }_{ 3 } \right) }_{ 5 }Cl \right] { NO }_{ 3 }$$
A six coordinate complex of formula $$CrCl_{3} . 6H_{2}O$$ has green colour. A $$0.1\ M$$ solution of the complex when treated with excess of $$AgNO_{3}$$ gave $$28.7\ g$$ of white precipitate. The formula of the complex would be___________.
  • $$[Cr(H_{2}O)_{6}]Cl_{3}$$
  • $$[Cr(H_{2}O)_{5}Cl]Cl_{2} . H_{2}O$$
  • $$[Cr(H_{2}O)_{4}Cl]Cl_{2} . 2H_{2}O$$
  • $$[Cr(H_{2}O)_{3}Cl_{3}] . 3H_{2}O$$
Which of the following complexes exists in facial and meridional forms? 
  • $$K[Cr(H_{2}O)_{2}(C_{2}O_{4})_{2}]$$
  • $$[Co(NH)_{3}(NO_2)_3]$$
  • $$[Co(NH_{3})_{5} (NO_{2})](NO_{3})_{2}$$
  • $$[Pt(NH_{3})(H_{2}O)Cl_{2}]$$
The halogen form compound among themselves with the formula $${ AA }^{ ' },{ AA }_{ 3 }^{ ' },{ AA }_{ 5 }^{ ' }$$ and $${ AA }_{ 7 }^{ ' }$$ where $$A$$ is the heavier halogen. Which of the following pairs representing their structure and being polar and non-polar are correct ?
(A) $${ AA }^{ ' }$$ linear, polar
(B) $${ AA }_{ 3 }^{ ' }$$ $$T-$$ Shaped, polar
(C) $${ AA }_{ 5 }^{ ' }$$ square pyramidal, polar
(D) $${ AA }_{ 7 }^{ ' }$$ pentagonal bipyramidal, non-polar
  • $$(A)$$ and $$(C)$$ are correct
  • $$(A)$$, $$(B)$$ And $$(C)$$ are correct
  • $$(B)$$, $$(C)$$ and $$(D)$$ are correct
  • $$(A)$$, $$(B)$$, $$(C)$$ and $$(D)$$ are correct
Which of the following compounds would exhibit co-ordination isomerism?
  • $$[Cr(H_2O)_5]Cl_2$$
  • $$[Cr(NH_3)_5][Co(CN)_5]$$
  • $$[Cr(en)_2]NO_2$$
  • $$[Ni(NH_3)_5][BF_4]_3$$
Several octahedral complexes are possible from combinations of $$Co^{3+}, Cl^{-}$$ and $$NH_{3}$$. Primary valence do not have chloride ion. The correct statement(s) regarding the octahedral coordination entities having the formula .$$[Co(NH_{3})_{n}Cl_{6 - n}]^{(n - 3)+}$$ with $$n\geq 3$$, is/ are_____________.
  • At most six octahedral complexes are possible
  • One of the complexes is homoleptic
  • All the complexes are paramagnetic
  • Some of the complexes dissociate in water to give $$Co^{3+}$$ and $$Cl^{-}$$ ions
Which among the following forms octahedral complex?
  • $$d^{4}$$ (low spin)
  • $$d^{8}$$ (high spin)
  • $$d^{6}$$ (low spin)
  • All of these
What is the oxidation number of gold in the complex $$[AuCl_4]^{1-}$$?
  • $$+4$$
  • $$+3$$
  • $$+2$$
  • $$+1$$
Compound $$[Co{(CN)}_{2}{(en)}_{2}]Cl$$ can show:
  • only optical isomerism
  • only geometrical and optical isomerism
  • only structural isomerism
  • structural, geometrical and optical isomerism
Which of the following statements is true about hybridisation?
  • The hybridised orbitals have different energies for each orbital.
  • The number of hybrid orbitals is equal to the number of atomic orbitals that are hybridised.
  • Hybrid orbitals form multiple bonds.
  • The orbitals with different energies undergo hybridisation.
If the value of C.F.S.E. for "Ni" is $$\Delta_0$$ then it is for Pd should  be ?
  • $$1.1\, \Delta_0$$
  • $$0.5\, \Delta_0$$
  • $$1.5\, \Delta_0$$
  • none of the above
Which one of the following complexes has largest value of $$\Delta_{0}$$?
  • $$[Cr(H_{2}O)_{6}]^{+2}$$
  • $$[Cr(H_{2}O)_{6}]^{+3}$$
  • $$[Mn(H_{2}O)_{6}]^{+2}$$
  • $$[Mn(H_{2}O)_{6}]^{+3}$$
According to Werner's theory of coordination compounds:
  • primary valency is ionisable
  • secondary valency is ionisable
  • primary and secondary valencies are ionisable
  • neither primary nor secondary valency is ionisable
Three arrangements are shown for the complex, $$[Co(en)(NH_3)_2Br_2]^+$$. Which one is the wrong statement?
935282_b4c8690b169146a197942524baf910f2.PNG
  • I and II are geometrical isomers.
  • II and III are optical isomers.
  • I and III are optical isomers.
  • II and III are geometrical isomers.
Copper sulphate dissolves in ammonia due to the formation of:
  • $$Cu_2O$$
  • $$[Cu(NH_3)_4]SO_4$$
  • $$[Cu(NH_3)_4]OH$$
  • $$[Cu(H_2O)_4]SO_4$$
The correct labeling of different terms used in coordination compounds is:

935810_75d73e1f3e9542e18fb318895b59311f.png
  • (i) Central atom, (ii) Ionisation sphere, (iii) Coordination number, (iv) Ligands
  • (i) Ligands, (ii) Coordination number, (iii) Valency, (iv) Ionisation sphere
  • (i) Ionisation sphere, (ii) Ligands, (iii) Coordination number, (iv) Central atom
  • (i) Ligands, (ii) Ionisation sphere, (iii) Coordination number, (iv) Central atom
Among the following complexes (K-P) :
$$K_3[Fe(CN_6]-K  $$ and $$  [Co(NH_3)_6]Cl_3-L$$ ; 
$$Na_3[Co(oxalate)_3]-M $$ and    $$  [Ni(H_2O)_6]Cl_2-N$$ ;
$$K_2[Pt(CN)_4]-O$$ and $$[Zn(H_2O)_6](NO_3)_2 - P$$;
the diamagnetic complexes are:
  • K,L,M,N
  • K,M,O,P
  • L,M,O,P
  • all 
Which one of the following has largest number of isomers?
(R = alkyl group,en = ethylenediamine)
  • $$[Ru(NH_3)_4Cl_2]^+$$
  • $$[Co(NH_3)_5Cl]^{2+}$$
  • $$[Ir(PR_3)_2H(CO)]^{2+}$$
  • $$[Co(en)_2Cl_2]^+$$
Both geometrical and optical isomerism are shown by:
  • $$[Co(en)_2Cl_2]^+$$
  • $$[Co(NH_3)_5Cl]^{2+}$$
  • $$[Co(NH_3)_4Cl_2]^{+}$$
  • $$[Cr(ox)_3]^{3-}$$
According to Werner's coordination theory, there are _______ kinds of valency, _______ and ______. The primary valency of a central metal ion is satisfied with ________.
  • three, negative, positive, cations
  • different, negative, positive, anions
  • two, primary, secondary, anions
  • two, saturated, unsaturated, cations
The compounds $$[Co(SO_4) (NH_3)_5]Br$$ and $$ [Co(SO_4)(NH_3)_5]Cl$$ represent:
  • linkage isomerism
  • ionisation isomerism
  • coordination isomerism
  • no isomerism
Which of the following shows maximum number of isomers?
  • $$[Co(NH_3)_4Cl_2]$$
  • $$[Ni(en)(NH_3)_4]^{2+}$$
  • $$[Ni(C_2O_4)(en)_2]^{2-}$$
  • $$[Cr(SCN)_2(NH_3)_4]^+$$
Which of the following sets of examples and geometry of the compounds is not correct?
  • Octahedral - $$[Co(NH_3)_6]^{3+}, [Fe(CN)_6]^{3-}$$
  • Square planar - $$[Ni(CN)_4]^{2-}, [Cu(NH_3)_4]^{2+}$$
  • Tetrahedral- $$[Ni(CO)_4], [ZnCl_4]^{2-}$$
  • Trigonal bipyramidal - $$[Fe(NH_3)_6]^{2+}, [CuCl_4]^{2-}$$
Which of the following pairs of isomers is not correctly matched with its type of isomerism?
  • $$[Cr(NH_3)_6][Cr(CN)_6]$$ and $$[Cr(NH_3)_4(CN)_2][Cr(NH_3)_2(CN)_4]$$ - Coordination isomerism
  • $$Co[(NH_3)_5NO_2]Cl_2$$ and $$[Co(NH_3)_5ONO]Cl_2$$- Linkage isomerism
  • $$[Co(py)_2(H_2O)_2Cl_2]Cl$$ and $$[Co(py)_2(H_2O)Cl_3]H_2O$$ -Coordination isomerism
  • $$[Pt(NH_3)_4Br_2]Cl_2 $$ and $$[Pt(NH_3)_4Cl_2]Br_2$$ -Ionisation isomerism
Match the column I with column II and mark the appropriate choice.
Column I
(Complex)
Column II
(Isomerism)
(A)$$[Co(NH_3)_6] [Cr(CN)_6]$$(i)Geometrical isomerism
(B)$$[Co(en)_2(NO_2)Cl]Br$$(ii)
Optical isomerism
(C)$$[Pt(en)_2Cl_2]$$(iii)Coordination isomerism
(D)$$[Cr(CN)_2(NH_3)_4]^{2+}$$(iv)Linkage isomerism
  • A - (iv), B - (ii), C - (iii), D - (i)
  • A - (ii), B - (iii), C - (i), D - (iv)
  • A - (iii), B - (iv), C - (ii), D - (i)
  • A - (i), B - (iii), C - (iv), D - (ii)
Two isomers of a compound $$[Co(NH_3)_3Cl_3]$$ $$(MA_3B_3\,$$ type) are shown in the figures. The isomers can be classified as:
935888_45f36b8ce3c742289cf1cbc51da06006.png
  • (i) fac-isomers (ii) mer-isomer
  • (i) optical-isomer (ii) trans-isomer
  • (i) mer-isomer (ii) fac-isomer
  • (i) trans-isomer (ii) cis-isomer.
Which of the following complexes exists as pair of enantiomers?
  • $$[Co(NH_3)_4Cl_2]^+$$
  • $$[Cr(en)_3]^{3+}$$
  • $$[Co(P(C_2H_5)_3)_2ClBr]$$
  • $$trans- [Co(en)_2Cl_2]^+$$
$$CuSO_4\cdot 5H_2O$$ is blue is colour while $$CuSO_4$$ is colourless due to:
  • presence of strong field ligand in $$CuSO_4\cdot 5H_2O$$
  • due to absence of water (ligand), d - d transitions are not possible in $$CuSO_4$$
  • anhydrous undergoes d - d transitions due to crystal field splitting
  • colour is lost due to unpaired electrons.
The correct energy level diagram for $$[Co(CN)_6]^{3-}$$
The hybridisation involved in $$[Co(C_2O_4)_3]^{3-}$$ is ?
  • $$ sp^3d^2$$
  • $$ sp^3d^3$$
  • $$dsp^3$$
  • $$d^2sp^3$$
$$[Pt(NH_3)_4][CuCl_4]$$ and $$[Cu(NH_3)_4][PtCl_4]$$ are known as:
  • ionisation isomers
  • coordination isomers
  • linkage isomers
  • polymerisation isomers.
Energy profile diagram for an exothermic reaction, $$A\xrightarrow { 1 } B\xrightarrow { 2 } C\xrightarrow { 3 } D$$, is given below.

The rate determining step of the reaction is :
989677_85ffe0975a054ade9c9fb1c109a5839b.png
  • $$A\longrightarrow B$$
  • $$B\longrightarrow C$$
  • $$C\longrightarrow D$$
  • can not preditc
The synthetic steroid ethynylestardiol (1) is a compound used in the birth control pill. How many $$sp^3$$ hybridised carbon atoms are present in compound (1) ?
988743_077c0214a56e4a56a832b7c52ae8497a.png
  • 8
  • 9
  • 10
  • 11
  • 12
0:0:1


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