Coordination Compounds

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.

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

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

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

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

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Vitamin B12 contains

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

The number of unpaired electrons in the complex ion [CoF6]3- is (Atomic no. : Co = 27)

1. 2
2. 3
3. 4
4. zero

Among the following which is not the -bonded organometallic compound?

1. K[PtCl3( 2-C2H4)]
2. Fe( 5-C5H5)2
3. Cr( 6-C6H6)2
4. (CH3)4Sn

Atomic number of Cr and Fe are respectively 24 and 26, which of the following is paramagnetic with the spin of electron?

1. [Cr(CO)6]
2. [Fe(CO)5]
3. [Fe(CN)6]4-
4. [Cr(NH3)6]3+

The hypothetical complex chloro diaquatriammine cobalt(III) chloride can be represented as

1. [CoCl(NH3)3(H2O)2]Cl2
2. [Co(NH3)3(H2O)Cl3]
3. [Co(NH2)3(H2O)2Cl]
4. [Co(NH3)3(H2O)3]Cl3