Some Basic Concepts of Chemistry - Result Question 16
16. Among the following, the species in which the oxidation number of an element is +6
(2000)
(a) $MnO _4^{-}$
(b) $Cr(CN) _6^{3-}$
(c) $NiF _6^{2-}$
(d) $CrO _2 Cl _2$
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Answer:
Correct Answer: 16. (d)
Solution:
In $\mathrm{MnO}_4^{-}$, oxidation state of Mn is +7
In $\mathrm{Cr}(\mathrm{CN})_6^{3-}$, oxidation state of Cr is +3
In $\mathrm{NiF}_6^{2-}, \mathrm{Ni}$ is in +4 oxidation state.
In $\mathrm{CrO}_2 \mathrm{Cl}_2$, oxidation state of Cr is +6 .
BETA
