Which one of the following does not have an u | vedclass

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(D) To determine the oxidation state of the underlined atoms:$1$. In $Fe_3O_4$,the average oxidation state of $Fe$ is $3x + 4(-2) = 0$,so $x = +8/3$.

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$Na_2\underline{S}_2O_3$

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(D) To determine the oxidation state of the underlined atoms:$1$. In $Fe_3O_4$,the average oxidation state of $Fe$ is $3x + 4(-2) = 0$,so $x = +8/3$. This is fractional.$2$. In $N_3H$ (hydrazoic acid),the average oxidation state of $N$ is $3x + 1 = 0$,so $x = -1/3$. This is fractional.$3$. In $KO_2$ (potassium superoxide),the oxidation state of $O$ is $+1 + 2x = 0$,so $x = -1/2$. This is fractional.$4$. In $Na_2S_2O_3$ (sodium thiosulfate),the average oxidation state of $S$ is $2(1) + 2x + 3(-2) = 0$,which gives $2x = 4$,so $x = +2$. This is an integer,not a fractional oxidation state.Therefore,$Na_2\underline{S}_2O_3$ does not have a fractional oxidation state.

Which one of the following does not have an underlined atom with a fractional oxidation state?

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