\[ \mathrm{BO}_{3}^{3-}+\text { conc. } \mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{CH}_{3} \mathrm{C...

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\[
\mathrm{BO}_{3}^{3-}+\text { conc. } \mathrm{H}_{2} \mathrm{SO}_{4}+\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{OH} \stackrel{\text { ignite }}{\longrightarrow} \text { (A) (green }
\]
flame)
What is the oxidation number of central atom in Compound \( \mathrm{A} \) that is responsible for green flame?
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