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Coordination Compounds · Question 69

AIPMT 2010 (Prelims)MCQMedium📈 Topic in 12% papers+4−1
1

Which one of the following complexes is not expected to exhibit isomerism?

  1. [Ni(NH3)4(H2O)2]2+
  2. [Pt(NH3)2Cl2]
  3. [Ni(NH3)2Cl2]
  4. [Ni(en)3]2+

Answer

(3) [Ni(NH3)2Cl2]

Solution

[Ni(NH3)4(H2O)2]2+: octahedral [MA4B2] cis–trans isomers.

[Pt(NH3)2Cl2]: square planar [MA2B2] cis–trans isomers.

[Ni(en)3]2+: octahedral [M(AA)3] optical isomers (d and l).

[Ni(NH3)2Cl2]: Ni2+ with weak field ligands sp3, tetrahedral.

As per NCERT, tetrahedral complexes do not show geometrical isomerism because the relative positions of the ligands are all the same; with no chiral arrangement it shows no optical isomerism either.

Answer: (3)

AIPMT 2010 (Prelims)

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2

Which of the following does not show optical isomerism? (en = ethylenediamine)

  1. [Co(NH3)3Cl3]0
  2. [Co(en)Cl2(NH3)2]+
  3. [Co(en)3]3+
  4. [Co(en)2Cl2]+
AIPMT 2009
3

Which of the following complex ions is expected to absorb visible light? (At. nos. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

  1. [Ti(en)2(NH3)2]4+
  2. [Cr(NH3)6]3+
  3. [Zn(NH3)6]2+
  4. [Sc(H2O)3(NH3)3]3+
AIPMT 2009
4

Which of the following complexes exhibits the highest paramagnetic behaviour? where gly = glycine, en = ethylenediamine and bpy = bipyridyl moieties. (At. nos. Ti = 22, V = 23, Fe = 26, Co = 27)

  1. [Co(ox)2(OH)2]-
  2. [Ti(NH3)6]3+
  3. [V(gly)2(OH)2(NH3)2]+
  4. [Fe(en)(bpy)(NH3)2]2+
AIPMT 2008
5

In which of the following coordination entities the magnitude of o (CFSE in octahedral field) will be maximum? (At. No. Co = 27)

  1. [Co(CN)6]3-
  2. [Co(C2O4)3]3-
  3. [Co(H2O)6]3+
  4. [Co(NH3)6]3+
AIPMT 2008
6

Which of the following will give a pair of enantiomorphs? (en = NH2CH2CH2NH2)

  1. [Cr(NH3)6][Co(CN)6]
  2. [Co(en)2Cl2]Cl
  3. [Pt(NH3)4][PtCl6]
  4. [Co(NH3)4Cl2]NO2
AIPMT 2007
7

The d electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour? (At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)

  1. [Fe(H2O)6]2+
  2. [Ni(H2O)6]2+
  3. [Cr(H2O)6]2+
  4. [Mn(H2O)6]2+
AIPMT 2007
8

[Cr(H2O)6]Cl3 (At. no. of Cr = 24) has a magnetic moment of 3.83 B.M. The correct distribution of 3d electrons in the chromium of the complex is

  1. 3d1xy, 3d1yz, 3d1z2
  2. 3d1(x2-y2), 3d1z2, 3d1xz
  3. 3d1xy, 3d1(x2-y2), 3d1yz
  4. 3d1xy, 3d1yz, 3d1xz
AIPMT 2006
9

[Co(NH3)4(NO2)2]Cl exhibits

  1. linkage isomerism, geometrical isomerism and optical isomerism
  2. linkage isomerism, ionization isomerism and optical isomerism
  3. linkage isomerism, ionization isomerism and geometrical isomerism
  4. ionization isomerism, geometrical isomerism and optical isomerism.
AIPMT 2006
10

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?

  1. [Zn(NH3)6]2+
  2. [Cr(NH3)6]3+
  3. [Co(NH3)6]3+
  4. [Ni(NH3)6]2+
AIPMT 2005
11

Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

  1. cis-[Pt(NH3)2Cl2]
  2. trans-[Pt(NH3)2Cl2]
  3. cis-[Co(en)2Cl2]+
  4. trans-[Co(en)2Cl2]+
AIPMT 2005

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