A) - 2
B) + 2
C) + 6
D) 0
Correct Answer: B
Solution :
\[\overset{*\,\,\,\,\,\,\,\,\,\,\,}{\mathop{{{S}_{2}}O_{3}^{2-}}}\,\] \[2x+3(-2)=-2\]; \[x=+2\].
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