In [Cr(NH₃)₆](Br)₃, number of unpaired electrons in Cr is:

In a quantitative analysis of second group in the lab, H2S gas is passed in an acidic medium for ppt. When Cu+2 and Cd+2 react with KCN, then in which of the following conditions will a precipitate not be formed due to relative stability:
 

The incorrect option among the following is:

1. Ni(CO)₄, Tetrahedral, paramagnetic
2. [Ni(CN)₄]^2-, Square planar, diamagnetic
3. Ni(CO)₄, Tetrahedral, diamagnetic
4. [Ni(Cl)₄]2-, Tetrahedral, paramagnetic

The atomic numbers of Cr and Fe are respectively 24 and 26. Among the following, the one that is paramagnetic with the spin of the electron is:

1. CrCO₆

2. FeCO₅

3. [Fe(CN)₆]^4-

4. [Cr(NH₃)₆]³⁺

The number of unpaired electrons in the complex ion [CoF₆]^3– is:

(Atomic No. Co = 27)

1. 2

2. 3

3. 4

4. Zero

In an octahedral structure, the pair of d orbitals involved in d²sp³ hybridization is:

1. ${\mathrm{d}}_{\mathrm{xz}},{\mathrm{d}}_{\mathrm{x}}^2-{\mathrm{y}}^2$

2. ${\mathrm{d}}_{\mathrm{z}}^2,{\mathrm{d}}_{\mathrm{xz}}$

3. ${\mathrm{d}}_{\mathrm{xy}},{\mathrm{d}}_{\mathrm{yz}}$

4. ${\mathrm{d}}_{\mathrm{x}}^2-{\mathrm{y}}^2,{\mathrm{d}}_{\mathrm{z}}^2$

Considering H₂O as a weak field ligand, the number of unpaired electrons in \([Mn(H_{2}O)_{6}]^{2+}\) will be:
(At. no. of Mn = 25)

Among [Ni(CO)₄], [Ni(CN)₄]²⁻, [ NiCl₄]²⁻ species, the hybridization states of the Ni atom are respectively:
(At. No. of Ni = 28)

Which one of the following is an inner orbital complex as well as is diamagnetic in behaviour?

1. [Zn (NH₃)₆]²⁺

2. [Ni (NH₃)₆]²⁺

3. [Cr (NH₃)₆]³⁺

4. [Co (NH₃)₆]³⁺