Which of the following is the correct magnetic nature and hybridization of the complex   [Ni(CNS)₆]^-4?

(a) Paramagnetic, sp³d²                          (b) Diamagnetic, sp³d² 

(c) Paramagnetic, d²sp³                          (d) Diamagnetic, d²sp²

In photography Na₂S₂O₃. 5H₂O is used

Which of the following complexes has different shape from others?

(a) [NiCl₄]^-2              (b) [Ni(CO)₄]         (c) [Ni(CN)₄]^-2         (d) [Zn(NH₃)₄]⁺²

Which of the following complex is square planar?

(a) Ni(CO)₄­              (b) Ni(CN)₄­^2-            (c) Fe(H₂O)₆³⁺­             (d) TiCl₄­

Hybridization of Cu²⁺ in Cu(CN)₄^2- is

(a) sp³                 (b) dsp²               (c) d²sp³                (d) dsp³

What is the hybridization of Fe(CO)_5­ complex ?

(a) sp³                 (b) dsp³                  (c) sp³d               (d) sp³d²

N, N – diethyldithiocarbamato is a

Which of the following has tetrahedral geometry

(a) [PbCl₄]^2–                           (b) [Ni(CN)₄]^2–                     

(c) [Pb(CN)₄]^2–                 (d) [Ni(Cl)₄]^2–

Stability of the complexes amongst the cation

Fe⁺², Co⁺², Ni⁺², Cu⁺², is

(a) Fe⁺² < Ni⁺² < Co⁺² < Cu⁺²                      (b) Fe⁺² < Co⁺² < Ni⁺² < Cu⁺²

(c) Fe⁺² < Cu⁺² < Co⁺² < Ni⁺²                       (d) None of these

In ‘Brown ring’ complex iron has

The trace metal present in insulin is :

Number of moles K₂Cr₂O₇ reduced by one mole of Sn²⁺ ions is :

Which statement is true about the transitional elements :

Which of the following oxide show maximum valency :

The transition element present in abundance