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Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions2 Marks
Question
Assign oxidation number to the underlined elements in the following species:$\text{Ca}\text{O}_2$
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Answer

$\begin{matrix} +2&\text{x}\\\text{Ca}&\text{ O}_2\end{matrix}$Then, we have
(+2) + 2(x) = 0
⇒ 2 + 2x = 0
⇒ x = -1
Hence, the oxidation number of O is -1.

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