Multiple Choice QuestionsWhich one of the following is an outer orbital complex and exhibits paramagnetic behaviour?
[Ni(NH3)6]2+
[Zn(NH3)6]2+
[Cr(NH3)6]3+
[Cr(NH3)6]3+
Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni (II).Which of the following statements is not true?
Red Complex has a square planar geometry
Complex has symmetrical H- bonding
Red complex has a tetrahedral geometry
Red complex has a tetrahedral geometry
Low spin complex of d6 -cation in an octahedral field will have the following energy
(Δo = Crystal field splitting energy in an octahedral field,
P= electron pairing energy)
The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of which type of isomerism?
Ionisation isomerism
Coordination isomerism
Geometrical isomerism
Geometrical isomerism
B.
Coordination isomerism
The complexes [Co(NH3)6] [Cr (CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of coordination isomerism. This isomerism occurs only in those complexes in which both cation and anion are complex. It occurs due to exchange of ligands between cation and anion.
The d- electron configurations of Cr3+, Mn2+ , Fe2+, and Co2+ are d4 ,d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour?
(At. no. Cr = 24, Mn = 25, Fe =26, Co = 27)
[Fe(H2O)6]2+
[Co(H2O)6]2+
[Cr(H2O)6]2+
[Cr(H2O)6]2+
Of the following complex ions, which is diamagnetic in nature?
[Ni(CN)4]2-
[CuCl4]2-
[CoF6]3-
[CoF6]3-
The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is
9
6
7
7
The name of complex ion, [Fe(CN)6]3- is
hexacyanoiron (III) ion
hexacyanitoferrate (III) ion
tricyanoferrate (III) ion
tricyanoferrate (III) ion
Which of the following carbonyl will have the strongest C- O bond?
(Mn(CO)6+
Cr(CO)6
V (CO)6-
V (CO)6-
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