MCQ
Oxidation number of $S$ in $SO_4^{2 - }$
- ✓$+6$
- B$+3$
- C$+2$
- D$-2$
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$\mathop { - CH{{(C{H_3})}_2}}\limits_1 \,\,\,\,\,\,\,\,\,\,\,\mathop { - C{H_2}C{H_2}Br}\limits_2 \,\,\,\,\,\,\,\,\,\,\mathop{ - C{H_2}Br}\limits_3 \,\,\,\,\,\,\,\,\,\mathop{ - C{{(C{H_3})}_3}}\limits_4$
$I = II = III = IV$
(Atomic numbers : $Fe=26,Co=27,Mn=25,Cr=24$)