Primary and secondary valencies of Cu in [Cu(NH₃)₄]SO₄ is _______.

(a)

4,4

(b)

2,4

(c)

4,1

(d)

4,2

Which of the following octahedral complexes do not show geometrical isomerism?

(a)

[Co(NH₃)₃Cl₃]

(b)

[PtCl₂(NH₃)₄]

(c)

[Pt(NH₃)₂Cl₂]

(d)

[Co(en)₃]³⁺

The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.

(a)

Tetrahedral

(b)

Octahedral

(c)

Square planar

(d)

Pentagonal pyramidal

According to CFT, five d-orbitals of an octahedral complex split to give _______.

(a)

One orbital with lower energy and four orbitals with higher energy

(b)

Two orbitals with lower energy and three orbitals with higher energy

(c)

Three orbitals with lower energy and two orbitals with higher energy

(d)

Four orbitals with lower energy and one orbital with higher energy.

Which of the following is correct statement?

(a)

[Ti(H₂O)₆]³⁺ is coloured complex

(b)

[Sc(H₂O)₆]³⁺ is colourless complex

(c)

d-d transition is not possible in [Sc(H₂O)₆]³⁺ complex

(d)

All of these