Coordination Compounds

Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, Cr = 24, Mn = 25, Fe = 26, Co = 27]

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

The number of complexes from the following with no electrons in the t2 orbital is . TiCl4, [MnO4]-, [FeO4]2-, [FeCl4]-, [CoCl4]2-

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

The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and M is metal) involves sp3 hybridization. The number of geometrical isomers exhibited by the complex is :

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

Number of complexes from the following with even number of unpaired "d" electrons is [V(H2O)6]3+, [Cr(H2O)6]2+, [Fe(H2O)6]3+, [Ni(H2O)6]3+, [Cu(H2O)6]2+ [Given atomic numbers: V = 23, Cr = 24, Fe = 26, Ni = 28, Cu = 29]

1. 1
2. 5
3. 2
4. 4

The correct sequence of ligands in the order of decreasing field strength is :

1. NCS- > EDTA4- > CN- > CO
2. CO > H2O > F- > S2-
3. S2- > -OH > EDTA4- > CO
4. -OH > F- > NH3 > CN-

If an iron (III) complex with the formula [Fe(NH3)x(CN)y]- has no electron in its eg orbital, then the value of x + y is

1. 6
2. 4
3. 3
4. 5

The number of unpaired d-electrons in [Co(H2O)6]3+ is .

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

Which of the following complex is homoleptic?

1. [Ni(NH3)2Cl2]
2. [Co(NH3)4Cl2]+
3. [Fe(NH3)4Cl2]+
4. [Ni(CN)4]2-

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is incorrect but Statement II is correct
2. Both Statement I and Statement II are correct
3. Both Statement I and Statement II are incorrect
4. Statement I is correct but Statement II is incorrect

[Co(NH3)6]3+ and [CoF6]3- are respectively known as :

1. Inner orbital Complex, Spin paired Complex
2. Spin paired Complex, Spin free Complex
3. Spin free Complex, Spin paired Complex
4. Outer orbital Complex, Inner orbital Complex