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Coordination Compounds · Question 77

AIPMT 2006MCQMedium📈 Topic in 25% papers+4−1
1

[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.

Answer

(3) linkage isomerism, ionization isomerism and geometrical isomerism

Solution

Linkage isomerism: NO2- is ambidentate (bonds through N as nitrito-N or through O as nitrito-O) ⇒ shown.

Ionization isomerism: Cl- outside and NO2- inside can interchange, e.g. [Co(NH3)4(NO2)Cl]NO2 ⇒ shown.

Geometrical isomerism: octahedral [MA4B2] type ⇒ cis and trans forms ⇒ shown.

Optical isomerism: both cis and trans forms of [MA4B2] have a plane of symmetry ⇒ not shown.

∴ The complex exhibits linkage, ionization and geometrical isomerism.

Answer: (3)

AIPMT 2006

Keep practising — Coordination Compounds

2

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
3

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
4

Which of the following coordination compounds would exhibit optical isomerism?

  1. Pentaamminenitrocobalt (III) iodide
  2. Diamminedichloroplatinum (II)
  3. trans-Dicyanobis (ethylenediamine) chromium (III) chloride
  4. tris-(Ethylenediamine) cobalt (III) bromide.
AIPMT 2004
5

Among [Ni(CO)4], [Ni(CN)4]2-, [NiCl4]2- species, the hybridisation states at the Ni atom are, respectively [Atomic number of Ni = 28]

  1. sp3, dsp2, dsp2
  2. sp3, dsp2, sp3
  3. sp3, sp3, dsp2
  4. dsp2, sp3, sp3
AIPMT 2004
6

CN- is a strong field ligand. This is due to the fact that

  1. it carries negative charge
  2. it is a pseudohalide
  3. it can accept electrons from metal species
  4. it forms high spin complexes with metal species.
AIPMT 2004
7

Considering H2O as a weak field ligand, the number of unpaired electrons in [Mn(H2O)6]2+ will be (atomic number of Mn = 25)

  1. three
  2. five
  3. two
  4. four
AIPMT 2004
8

Which of the following does not have a metal carbon bond?

  1. Al(OC2H5)3
  2. C2H5MgBr
  3. K[Pt(C2H4)Cl3]
  4. Ni(CO)4
AIPMT 2004
9

In an octahedral structure, the pair of d orbitals involved in d2sp3 hybridisation is

  1. dx2-y2, dz2
  2. dxz, dx2-y2
  3. dz2, dxz
  4. dxy, dyz
AIPMT 2004
10

Which of the following is considered to be an anticancer species?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2004
11

Vitamin B12 contains

  1. Fe(II)
  2. Co(III)
  3. Zn(II)
  4. Ca(II)
AIPMT 2003

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