Introduction to CFT

Q.

The total number of unpaired electrons present in the complex ${\mathrm{K}}_3\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$ is

Q. The CFSE for a high-spin d⁴ octahedral complex is

1. –0.6Δ_oct
2. –1.8Δ_oct
3. –1.6Δ_oct
4. –1.2Δ_oct

Q. When cobalt$\left(II\right)$ chloride is dissolved in water, a pink solution A is formed. When ammonia is passed through the solution, orange red solution is obtained. Then the sum of the coordination number and the oxidation state of central metal in the yellow coloured solution is :

Q. The paramagnetic species among the following is

1. $\left[Co\right(N{H}_3{)}_6{]}^{3+}$
2. $\left[Ni\right(CN{)}_4{]}^{2-}$
3. $\left[Fe\right(H_{2}O{)}_6{]}^{2+}$
4. $\left[Ni\right(CO{)}_4]$

Q.

Why cant ${\mathrm{CH}}_4$ use square planar geometry?

Q. Arrange the following in the increasing order of ligand field strength (according to spectrochemical series)

1. Br ^-
2. CN^-
3. H₂O
4. S^2-
5. NH₃

Q. According to the spectrochemical series, which is the strongest field ligand:

1. $C{N}^{-}$
2. $N{O}_2^{-}$
3. $N{H}_3$
4. $ethane1,2-diamine\left(en\right)$

Q. How many geometrical isomers are possible with the complex, $\left[Pt\right(py\left)\right(N{H}_3\left)BrCl\right]$?

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

Q.

Which of the following pairs of d-orbitals will have electron density along the axis?

1. $d_{z^2},d_{xz}$

2. $d_{xz},d_{yz}$

3. $d_{z^2},d_{x^2-y^2}$

4. $d_{xy},d_{x^2-y^2}$

Q. $d$ – orbitals of metal lose their degeneracy in:

1. Blue vitriol
2. Anhydrous $CuS{O}_4$
3. Potassium ferrocyanide
4. Potassium ferricyanide

Q.

What is the geometry of $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$?

Q. $d$ – orbitals of metal lose their degeneracy in:

1. Blue vitriol
2. Anhydrous $CuS{O}_4$
3. Potassium ferrocyanide
4. Potassium ferricyanide