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Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions1 Mark
Question
What is oxidation state of Cr in $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$
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Answer

Let oxidation state of Cr be ' x ', H is $+1, \mathrm{O}$ is -2 ,
$\mathrm{Cl}=-1$
$\mathrm{x}+12-12-3=0$
$\mathrm{x}=3$

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