Coordination Compounds

Of the following complex ions, which is diamagnetic in nature?

1. [NiCl4]2-
2. [Ni(CN)4]2-
3. [CuCl4]2-
4. [CoF6]3-

The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism?

1. Linkage isomerism
2. Ionization isomerism
3. Coordination isomerism
4. Geometrical isomerism

The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?

1. 3
2. 4
3. 0
4. 2

The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

1. [Mn(H2O)6]2+
2. [Fe(H2O)6]2+
3. [Co(H2O)6]2+
4. [Cr(H2O)6]2+

Which of the following carbonyls will have the strongest C–O bond?

1. Mn(CO)6+
2. Cr(CO)6
3. V(CO)6-
4. Fe(CO)5

Which of the following complex compounds will exhibit highest paramagnetic behaviour?

1. [Ti(NH3)6]3+
2. [Cr(NH3)6]3+
3. [Co(NH3)6]3+
4. [Zn(NH3)6]2+

Which of the following complex ions is not expected to absorb visible light?

1. [Ni(CN)4]2-
2. [Cr(NH3)6]3+
3. [Fe(H2O)6]2+
4. [Ni(H2O)6]2+

Crystal field stabilization energy for high spin d4 octahedral complex is

1. -1.8 0
2. -1.6 0 + P
3. -1.2 0
4. -0.6 0

The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to

1. linkage isomerism
2. geometrical isomerism
3. coordination isomerism
4. ionization isomerism.

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+