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Coordination Compounds

338 Questions
All Exams JEE Mains JEE Advanced TS-EAMCET AP-EAPCET
2016 JEE Mains MCQ
JEE Main 2016 (Offline)
The pair having the same magnetic moment is :
[At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27]
A.
[Cr(H2O)6]2+ and [Fe(H2O)6]2+
B.
[Mn(H2O)6]2+ and [Cr(H2O)6]2+
C.
[CoCl4]2– and [Fe(H2O)6]2+
D.
[Cr(H2O)6]2+ and [CoCl4]2–
2016 JEE Mains MCQ
JEE Main 2016 (Offline)
Which one of the following complexes shows optical isomerism?
(en = ethylenediamine)
A.
cis[Co(en)2Cl2]Cl
B.
trans[Co(en)2Cl2]Cl
C.
[Co(NH3)4Cl2]Cl
D.
[Co(NH3)3Cl3]
2015 JEE Mains MCQ
JEE Main 2015 (Offline)
Which of the following compounds is not colored yellow?
A.
K3[Co(NO2)6]
B.
(NH4)3[As(Mo3O10)4]
C.
BaCrO4
D.
Zn2[Fe(CN)6]
2015 JEE Mains MCQ
JEE Main 2015 (Offline)
The number of geometric isomers that can exist for square planar [Pt (Cl) (py) (NH3) (NH2OH)]+ is (py = pyridine) :
A.
3
B.
4
C.
6
D.
2
2014 JEE Mains MCQ
JEE Main 2014 (Offline)
The equation which is balanced and represents the correct product(s) is :
A.
[Mg (H2O)6 ]2+ + (EDTA)4- $\buildrel {excess\,NaOH} \over \longrightarrow $ [Mg (EDTA) ]2+ + 6H2O
B.
CuSO4 + KCN $\to$ K2 [Cu (CN)4] + K2SO4
C.
Li2O + 2KCl $\to$ 2LiCl + K2O
D.
[CoCl(NH3)5]+ + 5H+ $\to$ Co2+ + $5NH_4^+$ + Cl-
2014 JEE Mains MCQ
JEE Main 2014 (Offline)
The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :
A.
L3 < L2 < L4 < L1
B.
L1 < L2 < L4 < L3
C.
L4 < L3 < L2 < L1
D.
L1 < L3 < L2 < L4
2013 JEE Mains MCQ
JEE Main 2013 (Offline)
Which of the following complex species is not expected to exhibit optical isomerism?
A.
[Co (en)2 Cl2]-
B.
[Co (NH3)3 Cl3]
C.
[Co (en) (NH3)2 Cl2]+
D.
[Co (en)3]3+
2012 JEE Mains MCQ
AIEEE 2012
Which among the following will be named as dibromidobis (ethylene diamine) chromium(III) bromide?
A.
[Cr (en)3 ] Br3
B.
[Cr (en)2 Br2 ] Br
C.
[Cr (en) Br4 ]-
D.
[Cr (en) Br2 ] Br
2011 JEE Mains MCQ
AIEEE 2011
The magnetic moment (spin only) of [NiCl4]2− is
A.
5.46 BM
B.
2.82 BM
C.
1.41 BM
D.
1.82 BM
2011 JEE Mains MCQ
AIEEE 2011
Which of the following facts about the complex [Cr (NH3)6 ]Cl3 is wrong?
A.
The complex is paramagnetic
B.
The complex is an outer orbital complex
C.
The complex gives white precipitate with silver nitrate solution
D.
The complex involves d2sp3 hybridization and is octahedral in shape.
2010 JEE Mains MCQ
AIEEE 2010
A solution containing 2.675g of CoCl3. 6NH3 (molar mass = 267.5 g mol–1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78 g of AgCl (molar mass = 143.5 g mol–1). The formula of the complex is : (At. Mass of Ag = 108 u)
A.
[Co(NH3)6]Cl3
B.
[CoCl2(NH3)4]Cl
C.
[CoCl3(NH3)3]
D.
[CoCl(NH3)5]Cl2
2010 JEE Mains MCQ
AIEEE 2010
Which one of the following has an optical isomer ?
(en = ethylenediamine)
A.
[Zn (en) (NH3)2]2+
B.
[Co (en)3]3+
C.
[Co (H2O)4 en]3+
D.
[Zn (en)2]2+
2009 JEE Mains MCQ
AIEEE 2009
Which of the following has an optical isomer ?
A.
[Co(en)(NH3)2]2+
B.
[Co(H2O)4(en)]3+
C.
[Co(en)2(NH3)2]3+
D.
[Co(NH3)3Cl]+
2009 JEE Mains MCQ
AIEEE 2009
Which of the following pairs represents linkage isomers ?
A.
[Pd (P Ph3)2 (NCS)2] and [Pd (P Ph3)2 (SCN)2]
B.
[Co(NH3)5 NO3]SO4 and [Co(NH3)5 SO4]NO3
C.
[Pt Cl2(NH3)4] Br2 and [Pt Br2(NH3)4] Cl2
D.
[Cu (NH3)4] [Pt Cl4] and [Pt (NH3)4] [CuCl4]
2008 JEE Mains MCQ
AIEEE 2008
In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $\Delta _o$ be the highest?
A.
[Co(CN)6]3−
B.
[Co(C2O4)3]3−
C.
[Co(H2O)6]3+
D.
[Co(NH3)6]3+
2008 JEE Mains MCQ
AIEEE 2008
The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)2(C2O4)]NO2 (where (en) is ethylene diamine) are, respectively,
A.
6 and 2
B.
4 and 2
C.
4 and 3
D.
6 and 3
2007 JEE Mains MCQ
AIEEE 2007
Which one of the following has a square planar geometry?
A.
[CoCl4]2-
B.
[FeCl4]2-
C.
[NiCl4]2-
D.
[PtCl4]2-
2006 JEE Mains MCQ
AIEEE 2006
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
A.
Six
B.
Three
C.
One
D.
Two
2006 JEE Mains MCQ
AIEEE 2006
In Fe(CO)5, the Fe – C bond possesses :
A.
π-character only
B.
both $\sigma$ and π characters
C.
ionic character
D.
$\sigma$-character
2006 JEE Mains MCQ
AIEEE 2006
Nickel (Z = 28) combines with a uninegative monodentate ligand X– to form a paramagnetic complex [NiX4]2− . The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively
A.
one, tetrahedral
B.
two, tetrahedral
C.
one, square planar
D.
two, square planar
2006 JEE Mains MCQ
AIEEE 2006
The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is
A.
nitrito-N-pentaamminecobalt (III) chloride
B.
nitrito-N-pentaamminecobalt (II) chloride
C.
pentaammine nitrito-N-cobalt (II) chloride
D.
pentaammine nitrito-N-cobalt (III) chloride
2005 JEE Mains MCQ
AIEEE 2005
Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
(At. No. Cr = 24, Mn = 25, Fe = 26, Co = 27)
A.
[Cr(CN)6]-3
B.
[Mn(CN)6]-3
C.
[Fe(CN)6]-3
D.
[Co(CN)6]-3
2005 JEE Mains MCQ
AIEEE 2005
The IUPAC name of the coordination compound K3[Fe(CN)6] is
A.
Potassium hexacyanoferrate (II)
B.
Potassium hexacyanoferrate (III)
C.
Potassium hexacyanoiron (II)
D.
Tripotassium hexcyanoiron (II)
2005 JEE Mains MCQ
AIEEE 2005
Which of the following compounds shows optical isomerism?
A.
[Cu(NH3)4]+2
B.
[ZnCl4]-2
C.
[Cr(C2O4)3]-3
D.
[Co(CN)6]-3
2005 JEE Mains MCQ
AIEEE 2005
The oxidation state of Cr in [Cr(NH3)4Cl2]+ is :
A.
+3
B.
+2
C.
+1
D.
0
2005 JEE Mains MCQ
AIEEE 2005
The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is :
A.
d4 (in strong ligand field)
B.
d4 (in weak ligand field)
C.
d3 (in weak as well as in strong fields)
D.
d5 (in strong ligand field)
2004 JEE Mains MCQ
AIEEE 2004
The correct order of magnetic moments (spin only values in B.M.) among is :
(Atomic numbers: Mn = 25; Fe = 26, Co =27)
A.
[MnCl4]2- > [CoCl4]-2 > [Fe(CN)6]-4
B.
[Fe(CN)6]-4 > [CoCl4]2- > [MnCl4]2-
C.
[Fe(CN)6]4- > [MnCl4]2- > [CoCl4]2-
D.
[MnCl4]2- > [Fe(CN)6]4- > [CoCl4]2-
2004 JEE Mains MCQ
AIEEE 2004
Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN– ion towards metal species is :
A.
c, a
B.
b, c
C.
a, b
D.
a, b, c
2004 JEE Mains MCQ
AIEEE 2004
Which one of the following complexes in an outer orbital complex?
A.
[Fe(CN)6]4-
B.
[Ni(NH3)6]2+
C.
[Co(NH3)6]3+
D.
[Mn(CN)6]4-
2004 JEE Mains MCQ
AIEEE 2004
Which one the following has largest number of isomers? (R = alkyl group, en = ethylenediamine)
A.
[Ru(NH3)4Cl2]+
B.
[Co(en)2Cl2]+
C.
[Ir(PR3)2 H(CO)]2+
D.
[Co(NH3)5Cl]2+
2004 JEE Mains MCQ
AIEEE 2004
The coordination number of central metal atom in a complex is determined by :
A.
the number of ligands around a metal ion bonded by sigma bonds
B.
the number of only anionic ligands bonded to the metal ion
C.
the number of ligands around a metal ion bonded by sigma and pi- bonds both
D.
the number of ligands around a metal ion bonded by pi-bonds
2004 JEE Mains MCQ
AIEEE 2004
Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?
A.
Chlorophylls are green pigments in plants and contains calcium
B.
Carboxypeptidase – A is an enzyme and contains zinc
C.
Cyanocobalamin is B12 and contains cobalt
D.
Haemoglobin is the red pigment of blood and contains iron
2003 JEE Mains MCQ
AIEEE 2003
In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is :
A.
0
B.
+1
C.
+2
D.
-1
2003 JEE Mains MCQ
AIEEE 2003
One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl (s). The structure of the complex is :
A.
[Co(NH3)3Cl3]. 2NH3
B.
[Co(NH3)4Cl2] Cl. NH3
C.
[Co(NH3)4Cl] Cl2. NH3
D.
[Co(NH3)5Cl] Cl2
2003 JEE Mains MCQ
AIEEE 2003
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?
A.
In acidic solutions protons coordinate with ammonia molecules forming $NH^+_4$ ions and NH3 molecules are not available
B.
In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
C.
Copper hydroxide is an amphoteric substance
D.
In acidic solutions hydration protects copper ions.
2002 JEE Mains MCQ
AIEEE 2002
The most stable ion is :
A.
[Fe(OH)3]3-
B.
[Fe(Cl)6]3-
C.
[Fe(CN)6]3-
D.
[Fe(H2O)6]3+
2002 JEE Mains MCQ
AIEEE 2002
CH3 - Mg - Br is an organometallic compound due to :
A.
Mg - Br bond
B.
C - Mg bond
C.
C - Br bond
D.
C - H bond
2002 JEE Mains MCQ
AIEEE 2002
The type isomerism present in nitropentammine chromium $\left( {{\rm I}{\rm I}{\rm I}} \right)$ chloride is :
A.
optical
B.
linkage
C.
ionization
D.
polymerisation.