Among Ni(CO)4, [Ni(CN)4]2- and NiC12-4:
Ni(CO)4, and [Ni(CN)4]2- are diamagnetic and NiC12-4 is paramagnetic
Ni(CO)4, and NiC12-4 are diamagnetic and [Ni(CN)4]2- are paramagnetic
Ni(CO)4, is diamagnetic and [Ni(CN)4]2- and NiC12-4 are paramagnetic
NiC12-4 and [Ni(CN)4]2- are diamagnetic and Ni(CO)4 is paramagnetic
Which has maximum EAN of the underlined atoms?
(Cr = 24, Co = 27, Fe=26, Ni=28)
[Cr(EDTA)]-
[Co(en)3]3+
[Fe(C2O4)3]3-
[Ni(CN)4]2-
Which is used in cancer-chemotherapy?
Cis-plaitn
Zeisse’s sale
Both (a) and (b)
None of these
Zeisse’s salt is:
[Pt(NH3)2C12]
K[Pt(C13(C2H4)]
Fe(c5H5)2
None of these
Consider the following complexes:
(1) K2PtC16
(2) PtC14. 2NH3
(3) PtC14. 3NH3
(4) PtC14. 5NH3
their electrical conductances in aqueous solutions are:
256, 0, 97, 404
404, 0, 97, 256
256, 97, 0, 404
404, 97, 256, 0
Match the geometry(given in column A) with the complexes (given in column B) in:
Geometry:A
I: Octahedral
II: Square planar
III: Tetrahedral
Complex: B
P: [Ni(CN)4]2-
Q: Ni(CO)4
R: [Fe(CN)6]4-
I II III I II III
P Q R
R P Q
R Q P
Q P R
While Ti3+, V3+, Fe3+ and Co2+ afford a large number of tetrahedral complexes, Cr3+ never does this, the reason being:
Cr3+ forces high crystal field splitting with a varieties of ligands
Crystal field stabilization energy in octahedral vis-a-vis tetrahedral Cr3+ system plays the deciding role
The ionic radius of Cr3+ is the largest among the other M3+ ions mentioned
Electronegativity of Cr3+ is the largest among these trivalent 3d-metals and so chromium prefers to be associated with as many ligands as its ionic radius permits
0.0012 mol of CrC13. 6H2O was passed through a cation exchange resin and acid coming out of it required 28.5 mL of 0.125 M NaOH. Hence, complex is:
[Cr(H2O)5C1]C12. H2O
[Cr(H2O)4C12]. 2H2O
[Cr(H2O)6]C13
[Cr(H2O)3C13]. 3H2O
Nitroprusside ion is:
A: [FeII(CN)5NO+]2+ and not
B: [FeIII(CO)5NO]2+. A and B can be differentiated by:
Estimating the concentration of iron
Measuring the concentration of CN-
Measuring the magnetic moment
Thermally decomposing the compound
Bidentate ligands are:
C2O2-4 (oxalate)
En (ethylenediamine)
DMG (dimethyl glyoxime)
Gly (glycine)
Which of the following complexes are chelaets?
Bis-(dimethyl glyoximato) nickel (II)
Potassium ethylenediamineteracyanato chromate (III)
Tetraamminedicyanocobalt (III) nitrate
Trans-diglycinatopalladium (II)
Ziegler-Natta catalyst is an organometallic compound of which metal ____.
Iron
Zirconium
Rhodium
Titanium
Which of the following factors tends to increase the stability of metal ion complexes?
Higher ionic radius of the metal ion
Higher charge/size ratio of the metal ion
Lower ionisation potential of the metal ion
Lower basicity of the ligand
reacts with KCN solution and forms ____.
A co-ordination complex compound of cobalt has the molecular formulae containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution on reacting with excess of precipitate. The ionic formula for this complex would be: ____.