Test Index

CBSE Class 12 Chemistry 2022 Term 2 Delhi Set 3

© examsnet.com
Question : 6 of 12
Marks: +1, -0
(a) Using Valence Bond theory, predict the hybridization and magnetic character of following:
[CoF6]3−[\mathrm{CoF}_6]^{3-} [Atomic number of Co=27]\mathrm{Co}=27]
(b) Write IUPAC name of the following complex:
[CoBr2(en)2]+[\mathrm{CoBr}_2(\mathrm{en})_2]^{+}
(c) How many ions are produced from the complex [Co(NH3)6]Cl2[\mathrm{Co}(\mathrm{NH}_3)_6]\mathrm{Cl}_2 in solution?
Solution:  
(a) [CoF6]3−[\mathrm{CoF}_6]^{3-}
     Hybridization     =sp3d2\;\;\text{ Hybridization }\;\;= sp^3 d^2
     Magnetic Nature     =   Paramagnetic   \;\;\text{ Magnetic Nature }\;\;= \;\text{ Paramagnetic }\;
(b) [CoBr2(en)2]+[\mathrm{CoBr}_2(\mathrm{en})_2]^{+}
IUPAC name of the complex is Dibromidobis(ethane-1,2 -diamine) cobalt(III) ion.
(c) In aqueous solution of the complex, 3 ions are produced.
[Co(NH3)6]Cl2⇌[Co(NH3)6]+2+2Cl−[\mathrm{Co}(\mathrm{NH}_3)_6]\mathrm{Cl}_2 \rightleftharpoons [\mathrm{Co}(\mathrm{NH}_3)_6]^{+2} + 2 \mathrm{Cl}^{-}
© examsnet.com
Go to Question:
Prev Question
Next Question