Coordination Compounds

1

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

  1. 6 and 3
  2. 4 and 2
  3. 4 and 3
  4. 6 and 2
2

Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?

  1. The complex is paramagnetic.
  2. The complex gives white precipitate with silver nitrate solution.
  3. The complex is an outer orbital complex.
  4. The complex involves d2sp3 hybridisation and is octahedral in shape.
3

The coordination number of a central metal atom in a complex is determined by

  1. the number of only anionic ligands bonded to the metal ion
  2. the number of ligands around a metal ion bonded by sigma and pi ­bonds both
  3. the number of ligands around a metal ion bonded by pi­ bonds
  4. the number of ligands around a metal ion bonded by sigma bonds
4

The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is

  1. d5 (in strong ligand field)
  2. d3 (in weak as well as in strong fields)
  3. d4 (in weak ligand field)
  4. d4 (in strong ligand field)
5

The type of isomerism present in nitropentamine chromium (III) chloride is

  1. Optical
  2. Ionisation
  3. Linkage
  4. Polymerisation
6

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is

  1. 0
  2. –1
  3. +1
  4. +2
7

Which one of the following has largest number of isomers? (R = alkyl group, en = ethylenediamine)

  1. [Co(en)2Cl2]+
  2. [Co(NH3)5Cl]2+
  3. [Ir(PR3)2H(CO)]2+
  4. [Ru(NH3)4Cl2]+