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Practice each question, then open the answer or worked solution.
The atomic number of Mn, Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complexions are diamagnetic?
(i) [Co(NH3)6]3+
(ii) [Mn(CN)6]3–
(iii) [Fe(CN)6]4–
(iv) [Fe(CN)6]3–
Option (i) and (iii) are the answers.
The atomic number of Mn, Fe, Co and Ni are 25, 26 27 and 28 respectively.
Which of the following outer orbital octahedral complexes have the same number of unpaired electrons?
(i) [MnCl6]3–
(ii) [FeF6]3–
(iii) [CoF6]3–
(iv) [Ni(NH3)6]2+
Option (i) and (iii) is the answer.
Which of the following options are correct for [Fe(CN)6]3– complex?
(i) d2sp3hybridisation
(ii) sp3d2hybridisation
(iii) paramagnetic
(iv) diamagnetic
Solution;
Option (i) and (iii) are the answers.
Solution coming soon.
An aqueous pink solution of cobalt(II) chloride changes to deep blue on the addition of an excess of HCl. This is because____________.
(i) [Co(H2O)6]2+ is transformed into [CoCl6]4–
(ii) [Co(H2O)6]2+ is transformed into [CoCl4]2–
(iii) tetrahedral complexes have smaller crystal field splitting than octahedral complexes.
(iv) tetrahedral complexes have larger crystal field splitting than octahedral complex.
Option (ii) and (iii) are the answers.
Which of the following complexes is homoleptic?
(i) [Co(NH3)6]3+
(ii) [Co(NH3)4 Cl2]+
(iii) [Ni(CN)4]2–
(iv) [Ni(NH3)4Cl2]
Option (i) and (iii) are the answers.
Which of the following complexes are heteroleptic?
(i) [Cr(NH3)6]3+
(ii) [Fe(NH3)4 Cl2]+
(iii) [Mn(CN)6]4–
(iv) [Co(NH3)4Cl2]
Option (ii) and (iv) are the answers.
Identify the optically active compounds from the following :
(i) [Co(en)3]3+
(ii) trans– [Co(en)2 Cl2]+
(iii) cis– [Co(en)2 Cl2]+
(iv) [Cr (NH3)5Cl]
Option (i) and (iii) are the answers.
Identify the correct statements for the behaviour of ethane-1, 2-diamine as a ligand.
(i) It is a neutral ligand.
(ii) It is a didentate ligand.
(iii) It is a chelating ligand.
(iv) It is a unidentate ligand.
Option (i), (ii) and (iii) are the answers.
Which of the following complexes show linkage isomerism?
(i) [Co(NH3)5 (NO2)]2+
(ii) [Co(H2O)5CO]3+
(iii) [Cr(NH3)5 SCN]2+
(iv) [Fe(en)2 Cl2]+
Option (i) and (iii) are the answers.
III. Short Answer Type
Arrange the following complexes in the increasing order of conductivity of their solution: [Co(NH3)3Cl3], [Co(NH3)4Cl2] Cl, [Co(NH3)6]Cl3 , [Cr(NH3)5Cl]Cl2
The increasing order of conductivity is as follows: