PART - I : IIT-JEE PROBLEMS (PREVIOUS YEARS)PART - I : IIT-JEE PROBLEMS (PREVIOUS YEARS)

PART - I : IIT-JEE PROBLEMS (PREVIOUS YEARS)

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Marked Questions are having more than one correct option.Marked Questions are having more than one correct option.

1. Draw Draw the structures the structures of [Co(NHof [Co(NH₃₃))₆₆]]³⁺³⁺, [Ni(CN), [Ni(CN)₄₄]]²²^–^– and [Ni(CO) and [Ni(CO)₄₄]. Write the hybridisation of atomic orbitals of ]. Write the hybridisation of atomic orbitals of thethe transition metal in each case.

transition metal in each case. [JEE[JEE – –2000,2000, 3/100]3/100]

2. The The complex complex ion whiion which has ch has no 'd' no 'd' electrons in electrons in the central the central metal atom metal atom is is :: [JEE[JEE – –2001,2001, 1/35]1/35]

[Atomic number Cr = 24, Mn = 25, Fe = 26, Co = 27]

(A) [MnO

(A) [MnO₄₄]]

¯ ¯

(B) [Co(NH(B) [Co(NH₃₃))₆₆]]³⁺³⁺ (C) [Fe(CN)(C) [Fe(CN)₆₆]]³³^–^– (D) [Cr(H(D) [Cr(H₂₂O)O)₆₆]]³⁺³⁺

3. A metal complex having composition Cr(NHA metal complex having composition Cr(NH₃₃))₄₄ Cl Cl₂₂Br has been isolated in Br has been isolated in two forms A and B. The form A reactstwo forms A and B. The form A reacts with AgNO

with AgNO₃₃ to give a white precipitate readily soluble in dilute aqueous ammo to give a white precipitate readily soluble in dilute aqueous ammonia, where as B gives a pale yellownia, where as B gives a pale yellow precipitate soluble in concentrated ammonia. W

precipitate soluble in concentrated ammonia. Write the formrite the formula of A and B and state the hybridization of chromiumula of A and B and state the hybridization of chromium in each. Calculate their magnetic moments (spin only value).

in each. Calculate their magnetic moments (spin only value). [JEE[JEE – –2001,2001, 5/100]5/100]

4. Deduce the structure of [NiClDeduce the structure of [NiCl₄₄]]²²^–^– and [Ni(CN) and [Ni(CN)₄₄]]²²^–^– considering the hybridisation of the m considering the hybridisation of the metal ion. Calculate theetal ion. Calculate the magnetic moment (spin only) of the species.

magnetic moment (spin only) of the species. [JEE[JEE – –2002,2002, 5/60]5/60]

5. A green complex, KA green complex, K₂₂[Cr(NO)(NH[Cr(NO)(NH₃₃)(CN))(CN)₄₄] is paramagnetic and has] is paramagnetic and has

33

_eff_eff = 1.73 BM. W = 1.73 BM. Write the IUPArite the IUPAC name of C name of thethe complex and draw the structure

complex and draw the structure of anion and find out the hybridisation of metal ion.of anion and find out the hybridisation of metal ion. [JEE[JEE – –2003,2003, 4/60]4/60]

6. The species having tetrahedral shape is :The species having tetrahedral shape is : [JEE[JEE – –2004,2004, 3/84]3/84]

(A) [PdCl

(A) [PdCl₄₄]]²²^–^– (B) [Ni(CN)(B) [Ni(CN)₄₄]]²²^–^– (C) [Pd(CN)(C) [Pd(CN)₄₄]]²²^–^– (D) [NiCl(D) [NiCl₄₄]]²²^–^– 7.

7. The spin magnetic moment The spin magnetic moment of cobalt in the compound, Hg [Co(SCN)of cobalt in the compound, Hg [Co(SCN)₄₄] is :] is : [JEE[JEE – –2004,2004, 3/84]3/84]

(A)

(A) 33 (B)(B) 88 (C)(C) 1515 (D)(D) 2424

8. When dimethyl glyoxime is added to the aqueous solution of nickel (II) chloride in presence of When dimethyl glyoxime is added to the aqueous solution of nickel (II) chloride in presence of dilute ammoniadilute ammonia solution, a bright red coloured

solution, a bright red coloured precipitate is obtained.precipitate is obtained. [JEE[JEE – –2004,2004, 4/60]4/60]

(a) Draw the structure of bright red s

(a) Draw the structure of bright red substance.ubstance.

(b) Write the oxidation state of

(b) Write the oxidation state of nickel in the substance and hybridisation.nickel in the substance and hybridisation.

9. Which kind of isomerism Which kind of isomerism is exhibited by octaheis exhibited by octahedral [Co(NHdral [Co(NH₃₃))₄₄BrBr₂₂]Cl ?]Cl ? [JEE[JEE – –2005,2005, 3/84]3/84]

((AA) ) GGeeoommeettrriiccaal l aannd d iioonniizzaattiioonn ((BB) ) GGeeoommeettrriiccaal l aannd d ooppttiiccaall ((CC) ) OOppttiiccaal l aannd d iioonniizzaattiioonn ((DD) ) GGeeoommeettrriiccaal l oonnllyy

10.

10. In the given reaction sequence, Identify (A) and (B).In the given reaction sequence, Identify (A) and (B).

Fe Fe³⁺³⁺ + +

)) Excess Excess ((

SCN SCN

# # # # # # $ $ #

#

⁰⁰ _Blood_Blood^A^A_red_red

# # # #

^F^F⁰⁰

# #

⁽⁽^excess^excess

# # # #

⁾⁾

$ $

colourless(B) colourless(B) ((aa)) WrWriitte te thhe Ie IUUPPAAC nC naame me oof (f (AA) a) annd (d (BB).).

((bb)) FiFinnd od out ut ththe se sppin in ononly ly mamagngnetetiic mc momomenent ot of Bf B.. [JEE[JEE – –2005,2005, 4/60]4/60]

11.1. The bond length in CO is 1.128The bond length in CO is 1.128

Å. What w Å. What will ill be the be the bond length bond length of CO of CO in Fe(CO) in Fe(CO)

₅₅ ? ? [JEE[JEE – –2006,2006, 5/184]5/184]

(A) 1.158

Å Å

(B) 1.128(B) 1.128

Å Å

(D) 1.118(D) 1.118

Å Å

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Page No. # 34 Page No. # 34 Comprehension # (Q.12 to Q.14)

Comprehension # (Q.12 to Q.14) NiCl

NiCl₂₂ # # _HCN_HCN # $ # $^KCN^KCN # # _{complex A}_{complex A} NiCl

NiCl₂₂ # # _excess_excess # # $^KCl^KCl # # $ _{complex B}_{complex B}

A & B complexes have the co-ordination number 4.

12.

12. The IUPAThe IUPAC name of comC name of complexesplexes

A A

‘‘ ’’

& &

‘‘

B B

’’

are respectively : are respectively :

[JEE[JEE – –2006,2006, 5/184]5/184]

(A) Potassium tetracyanonickelate(

!! !!

) and Potassium tetrachloronickelate() and Potassium tetrachloronickelate(

!! !!

)) (B) Potassium tetracyanonickel(

(B) Potassium tetracyanonickel(

!! !!

) and Potassium tetrachloronickel() and Potassium tetrachloronickel(

!! !!

)) (C) Potassium cyanonickelate(

!! !!

) and Potassium chloronickelate() and Potassium chloronickelate(

!! !!

)) (D) Potassium cyanonickel(

(D) Potassium cyanonickel(

!! !!

) and Potassium chloronickel() and Potassium chloronickel(

!! !!

)) 13.

13. The hybridisation of both complexes are :The hybridisation of both complexes are : [JEE[JEE – –2006,2006, 5/184]5/184]

(A) dsp

(A) dsp²² (B) sp(B) sp²² & dsp & dsp²² (C) dsp(C) dsp²² & & spsp³³ (D) both sp(D) both sp³³ 14.

14. What are the magnetic nature ofWhat are the magnetic nature of

A A

‘‘ ’’

& &

‘‘

B B

’’

? ?

[JEE[JEE – –2006,2006, 5/184]5/184]

(A) Both diamagnetic.

(B)

A A

‘‘ ’’

is diamagnetic & is diamagnetic &

‘‘

B B

’’

is paramagnetic with one unpaired electrons. is paramagnetic with one unpaired electrons.

(C)

A A

‘‘ ’’

is diamagnetic & is diamagnetic &

‘‘

B B

’’

is paramagnetic with two is paramagnetic with two unpaired electrons. unpaired electrons.

(D) Both are paramagnetic.

15.

15. Among the following metal carbonyls, the CAmong the following metal carbonyls, the C – –

O bond order is lowest in : O bond order is lowest in :

[JEE[JEE – –2007,2007, 3/162]3/162]

(A) [Mn(CO)

(A) [Mn(CO)₆₆]]⁺⁺ (B) [V(CO)(B) [V(CO)₆₆]]

¯ ¯

16.

16. Match the complexes in Column-I with their properties listed in Column-II.Match the complexes in Column-I with their properties listed in Column-II. [JEE[JEE – –2007,2007, 6/162]6/162]

Column-Column-II Column-Column-IIII

((AA)) [[CCoo((NNHH₃₃))₄₄(H(H₂₂O)O)₂₂]Cl]Cl₂₂ ((pp)) GGeeoommeettrriiccaal il issoommeerrss ((BB)) [[PPtt((NNHH₃₃))₂₂ClCl₂₂]] ((qq)) PPaarraammaaggnneettiicc

((CC)) [[CCoo((HH₂₂O)O)₅₅CCll]]CCll ((rr)) DDiiaammaaggnneettiicc

((DD)) [[NNii((HH₂₂O)O)₆₆]Cl]Cl₂₂ ((ss)) MMeettaal l iioon wn wiitth +h +2 o2 oxxiiddaattiioon sn sttaattee 17.

17. The IUPAThe IUPAC name of C name of [Ni(NH[Ni(NH₃₃))₄₄] [NiCl] [NiCl₄₄] is :] is : [JEE[JEE – –2008,2008, 3/163]3/163]

(A) T

(A) Tetraetrachlchlorooronicnickel(kel(II) teII) tetraatraamminmminenienickel (Ickel (II)I) (B) T(B) Tetraetraammiamminennenickeickel(Il(II) tetI) tetrachrachlorloronionickel (Ickel (II)I) (C) Te

(C) Tetraamminetraamminenickelnickel(II) tetrachloro(II) tetrachloronickelnickelate (II)ate (II) (D) Tet(D) Tetraammineniraamminenickel(IIckel(II) ) tetrachtetrachloroniloronickelate (0)ckelate (0) 18.

18. Both [Ni(CO)Both [Ni(CO)₄₄] and [Ni(CN)] and [Ni(CN)₄₄]]²²^–^– are diamagnetic. The are diamagnetic. The hybridisation of nickel in these complexes, rhybridisation of nickel in these complexes, respectivelyespectively, are :, are : [JEE

[JEE – –2008,2008, 3/163]3/163]

(A) sp

(A) sp³³, sp, sp³³ (B) sp(B) sp³³, dsp, dsp²² (C) dsp(C) dsp²², , spsp³³ (D) dsp(D) dsp²², , spsp²² 1

199.. SSttaatteemmeennt t - - 1 1 :: The geometrical isomers of the complex [M(NHThe geometrical isomers of the complex [M(NH₃₃))₄₄ClCl₂₂] are optically inactive,] are optically inactive, andand Statement - 2 :

Statement - 2 : Both geometrical isomers of the complex [M(NHBoth geometrical isomers of the complex [M(NH₃₃))₄₄ClCl₂₂] possess axis ] possess axis of symmetry.of symmetry.

[JEE

[JEE – –2008, 3/163]2008,3/163]

(A) Statement-1 is True, Statement-2 is True; Statement-2 is a

(A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for correct explanation for StStatement-1.atement-1.

(B) Statement-1 is True, Stat

(B) Statement-1 is True, Statement-2 is True; ement-2 is True; StStatement-2 is NOT atement-2 is NOT a correct explanation for a correct explanation for StStatement-1atement-1 (C) Statement-1 is True, Statement-2 is False

(D) Statement-1 is False, StatStatement-2 is ement-2 is TrueTrue 2

200.. SSttaatteemmeennt t - - 1 1 :: [Fe(H[Fe(H₂₂O)O)₅₅NO]SONO]SO₄₄ is paramagnetic, is paramagnetic, andand Statement - 2 :

Statement - 2 : The Fe in [Fe(HThe Fe in [Fe(H₂₂O)O)₅₅NO]SONO]SO₄₄ has three unpaired electrons. has three unpaired electrons. [JEE [JEE – –2008, 3/163]2008,3/163]

(A) Statement-1 is True, Statement-2 is True; Statement-2 is a

(A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for correct explanation for StStatement-1.atement-1.

(B) Statement-1 is True, Stat

(D) Statement-1 is False, StatStatement-2 is ement-2 is TrueTrue ETOOS

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Page No. # 35 Page No. # 35 21.

21. The compound(s) that exhibit(s) geometrical isomerism is(are) :The compound(s) that exhibit(s) geometrical isomerism is(are) : [JEE[JEE – –2009,2009, 4/160]4/160]

(A) [Pt(en)Cl

(A) [Pt(en)Cl₂₂]] ((BB) ) [[PPtt((eenn))₂₂]Cl]Cl₂₂ (C) [Pt(en)(C) [Pt(en)₂₂ClCl₂₂]Cl]Cl₂₂ (D) [Pt(NH(D) [Pt(NH₃₃))₂₂ClCl₂₂]]

22.

22. The spin only magnetic moment value (in Bohr magneton units) of The spin only magnetic moment value (in Bohr magneton units) of Cr(CO)Cr(CO)₆₆is :is : [JEE[JEE – –2009,2009, 3/160]3/160]

((AA) ) 00 ((BB) ) 22..8844 ((CC) ) 44..9900 ((DD) ) 55..9922 23.

23. The correct The correct structure of ethylenediaminetetraacetic acid (EDTA) is :structure of ethylenediaminetetraacetic acid (EDTA) is : [JEE[JEE – –2010,2010, 3/163]3/163]

(A) (A)

(B) (B)

(D) (D)

24.

24. The ionization isomer of [Cr(HThe ionization isomer of [Cr(H₂₂O)O)₄₄Cl (NOCl (NO₂₂)]Cl is :)]Cl is : [JEE[JEE – –2010,2010, 3/163]3/163]

(A) [Cr(H

(A) [Cr(H₂₂O)O)₄₄(O(O₂₂N)]ClN)]Cl₂₂ (B) [Cr(H(B) [Cr(H₂₂O)O)₄₄ClCl₂₂](NO](NO₂₂)) (C) [Cr(H

25. The complex showing a spin-only magnetic moment of 2.82 B.M. is :The complex showing a spin-only magnetic moment of 2.82 B.M. is : [JEE[JEE – –2010,2010, 5/163]5/163]

(A) Ni(CO)

(A) Ni(CO)₄₄ (B) [NiCl(B) [NiCl₄₄]]²²^–^– (C) Ni(PPh(C) Ni(PPh₃₃))₄₄ (D) [Ni(CN)(D) [Ni(CN)₄₄]]²²^–^– 26.

26. TTotal number of geometrical isomers otal number of geometrical isomers for the complex [RhCl(CO)(PPhfor the complex [RhCl(CO)(PPh₃₃)(NH)(NH₃₃)] is :)] is : [JEE[JEE – –2010,2010, 3/163]3/163]

27.

27. Geometrical shapes of the complexes formGeometrical shapes of the complexes formed by the reaction Nied by the reaction Ni²⁺²⁺ with Cl with Cl^–^–, CN, CN^–^– and H and H₂₂O, respectively, are :O, respectively, are : [JEE

[JEE – –2011,2011,3/240]3/240]

(A) o

(A) octactahehedradral, tl, tetretrahahedredral aal and sqnd squaruare ple planaanarr (B) t(B) tetretraheahedradral, sl, squaquare plre planaanar and or and octactahehedradrall (C) s

(C) sququare pare plalanarnar, tet, tetrahrahedredral anal and octd octaheahedradrall (D) o(D) octactahedhedral sral squaquare plre planaanar and or and octactahedhedralral 28.

28. Among the following complexesAmong the following complexes (K-P)(K-P) K

K₃₃[Fe(CN)[Fe(CN)₆₆]] (K)(K), [Co(NH, [Co(NH₃₃))₆₆]Cl]Cl₃₃(L)(L), , NaNa₃₃[Co(oxalate)[Co(oxalate)₃₃]] (M)(M), [Ni(H, [Ni(H₂₂O)O)₆₆]Cl]Cl₂₂(N)(N),, K

K₂₂[Pt(CN)[Pt(CN)₄₄]] (O)(O) and [Zn (H and [Zn (H₂₂O)O)₆₆] (NO] (NO₃₃))₂₂(P)(P) the diamagnetic complexes are :

the diamagnetic complexes are : [JEE[JEE – –2011,2011,3/240]3/240]

(A)

(A) K, L, M, NK, L, M, N (B)(B) K, M, O, PK, M, O, P (C) L, M, O, P(C)L, M, O, P (D)(D) L, M, N, OL, M, N, O 29.

29. The colour of The colour of light absorbed by an aqueous solution of CuSOlight absorbed by an aqueous solution of CuSO₄₄ is is :: [JEE[JEE – –2012,2012, 3/210]3/210]

((AA) ) oorraannggee--rreedd ((BB) ) bblluuee--ggrreeeenn ((CC) ) yyeellllooww ((DD) ) vviioolleett 30.

30. As per IUPAAs per IUPAC nomenclature, the name of the comC nomenclature, the name of the com plex [Co(Hplex [Co(H₂₂O)O)₄₄ (NH (NH₃₃))₂₂]Cl]Cl₂₂ is is :: [JEE-2012, 3/210][JEE-2012, 3/210]

(A) ) TTetetraraaqaquauadidiamamininececobobalalt t (I(IIIII) ) chchloloriridede (B(B) ) TTetetraraaqaquauadidiamammiminenecocobabalt lt (I(IIIII) ) chchloloriridede (C

(C) Di) Diamaminineteteetrtraaaaququaacocobbalalt (It (IIIII) ch) chllororiidede (D(D) Di) Diamammiminenetetetrtraaaaququaacocobaballt (It (IIIII) ch) chllororiidede 31.

31. NiClNiCl₂₂{P(C{P(C₂₂HH₅₅))₂₂(C(C₆₆HH₅₅)})}₂₂ exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni

coordination geometries of Ni²⁺²⁺ in the paramagnetic and diamagnetic states are respect in the paramagnetic and diamagnetic states are respectivelyively[JEE-2012, 3/198][JEE-2012, 3/198]

((AA) ) tteettrraahheeddrraal l aannd d tteettrraahheeddrraall ((BB) ) ssqquuaarre e ppllaannaar r aannd d ssqquuaarre e ppllaannaarr ((CC) ) tteettrraahheeddrraal l aannd d ssqquuaarre e ppllaannaarr ((DD) ) ssqquuaarre e ppllaannaar r aannd d tteettrraahheeddrraall

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In document IIT JEE Coordination Compound Etoos DPP (Page 34-37)