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Chemistry · 2022 · 3 marks
CBSE 2022 · Region 3 · Set 2 · Q10
(a) Using valence bond theory, predict the hybridization and magnetic character of following: [ CoF_6]^3-[ Atomic number of Co =27] (b) Write IUPAC…
(a)
Using valence bond theory, predict the hybridization and magnetic character of following :
$\displaystyle \left[\mathrm{CoF}_{6}\right]^{3-}[$ Atomic number of $\displaystyle \mathrm{Co}=27]$
(b)
Write IUPAC name of the following complex : $\displaystyle \left[\mathrm{CoBr}_{2}(\mathrm{en})_{2}\right]^{+}$
(c)
How many ions are produced from the complex $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{2}$ in solution?
Marking-scheme solution
(a) \(\displaystyle s p^{3} d^{2}\), paramagnetic
(b) dibromidobis(ethane-$\displaystyle 1,2$-diamine)cobalt (III) ion
(c) $\displaystyle 3$
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CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.