Among the following, the species in which the oxidation… — JEE Main 2000 Chemistry PYQ

2000

Among the following, the species in which the oxidation number of an element is +6

A.
$\text{MnO}_4^-$
B.
$\text{Cr(CN)}_6^{4-}$
C.
$\text{NiF}_6^{2-}$
D.
$\text{CrO}_2\text{Cl}_2$

Show answer and solution

Correct option: D

Solution

In CrO₂Cl₂, each O is −2 and each Cl is −1. For the neutral molecule: Cr + 2(−2) + 2(−1) = 0, giving Cr = +6. This is the only species where an element reaches the +6 oxidation state (Cr⁶⁺ in chromyl chloride).

[2000]

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