22525.A magnetic moment of 1.73 BM will be shown by one among the following
[Cu(NH3)4]2+
[Ni(CN)4]2–
TiCl4
[CoCl6]4–
22526.In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic?
N2 → N2+
O2 → O2+
C2 → C2+
NO → NO+
22527.In which of the following octahedral complexes of Co (at no. 27), will the magnitude of Δo be the highest?
[Co(C2O4)3]3–
[Co(H2O)6]3+
[Co(NH3)6]3+
[Co(CN)6]3–
22528.Which of the following statements is incorrect?
In K4[Fe(CN)6], the ligand has satisfied both primary and secondaryvalencies of ferrous ion.
In [Cu(NH3)4]SO4, the ligand has satisfied only the secondary valency of copper.
In K3[Fe(CN)6], the ligand has satisfied only the secondary valency of ferric ion.
In K3[Fe(CN)6], the ligand has satisfied both primary and secondary valencies of ferric ion.
22529.The complex showing a spin–only magnetic moment of 2.82 B.M. is
Ni(CO)4
[NiCl4]2–
Ni(PPh3)4
[Ni(CN)4]2–
22530.Among the ligands NH3, en, CN– and CO, the correct order of their increasing field strength, is
en < CH– < NH3 < CO
CO < NH3 < en < CN–
NH3 < en < CN– < CO
CN– < NH3 < CO < en
22531.Among the properties (A) reducing, (B) oxidizing, (C) complexing, the set of properties shown by CN– ion towards metal species is:
A, B
B, C
C, A
A, B, C
22532.An octahedral complex is formed when hybrid orbitals of the following type are involved
sp3
dsp2
d2sp3
sp2d2
22533.For the given complex [CoCl2(en)(NH3)2]+, the number of geometrical isomers, the number of optical isomers and total number of isomers of all type possible respectively are
2, 2 and 4
2, 2 and 3
2, 0 and 2
0, 2 and 2
22534.Geometrical shapes of the complexes formed by the reaction of Ni2+ with Cl–, CN– and H2O, respectively are
Octahedral, tetrahedral and square planar
Tetrahedral, square planar and octahedral
Square planar, tetrahedral and octahedral
Octahedral, square planar and octahedral
22535.Nickel (Z = 28) combines with a uninegative monodentate ligand X– to form a paramagnetic complex [NiX4]2–. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively
one, tetrahedral
two, tetrahedral
one, square planar
two, square planar
22536.The IUPAC name of K2[Ni(CN)4]is ______.
Potassium tetracyanatonickelate (II)
Potassium tetracyanonickelate (II)
Potassium tetracyanonickel (III)
Potassium tetracyanatonickel (II)
22537.A solution containing 2.675 g of CoCl3.6NH3 (molar mass = 267.5 g mol–1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78g of AgCl (molar mass = 143.5 g mol–1). The formula of the complex is (At. Mass of Ag = 108 u)
[Co(NH3)6]Cl3
[CoCl2(NH3)4]Cl
[CoCl3(NH3)3]
[CoCl(NH3)5]Cl2
22538.The ionisation isomer of [Cr(H2O)4Cl(NO2)C] is
[Cr(H2O)4(O2N)]Cl2
[Cr(H2O)4Cl2](NO2)
[Cr(H2O)4Cl(ONO)Cl
[Cr(H2O)4Cl2(NO2)]H2O
22539.The volume (in mL) of 0.1 M AgNO3 required for complex precipitation of chloride ions present in 30 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2, as silver chloride is close to
3
4
5
6
22541.How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
Six
Three
One
Two
22542.The pair of compounds having metals in their highest oxidation state is
MnO2, FeCl3
[MnO4]–, CrO2Cl2
[Fe(CN)6]3–, [Co(CN)3]
[NiCl4]2–, [CoCl4]–
22543.The IUPAC name of the coordination compound K3[Fe(CN)6] is
Potassium hexacyanoferrate (II)
Potassium hexacyanoferrate (III)
Potassium hexacyanoiron (II)
tripotassium hexcyanoiron (II)
22544.The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is
nitrito–N–pentaamminecobalt (III) chloride
nitrito–N–pentaamminecobalt (II) chloride
pentaammine nitrito–N–cobalt (II) chloride
pentaammine nitrito–N–cobalt (III) chloride