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(C) The structure of tetrathionic acid $(H_2S_4O_6)$ is $HO-SO_2-S-S-SO_2-OH$. In this molecule,the two terminal sulphur atoms are in the $+5$ oxidati

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There are three $S-S$ linkages in a molecule

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(C) The structure of tetrathionic acid $(H_2S_4O_6)$ is $HO-SO_2-S-S-SO_2-OH$. In this molecule,the two terminal sulphur atoms are in the $+5$ oxidation state,while the two central sulphur atoms are in the $0$ oxidation state. Therefore,the oxidation states of all sulphur atoms are not the same. There are three $S-S$ linkages in the molecule ($S-S-S-S$ chain). The oxygen atoms are present in two environments: terminal $OH$ groups and double-bonded $O$ atoms,so their oxidation states are not all the same. The oxidation state of hydrogen is $+1$,not $-1$.

Which of the following statements is correct regarding $H_2S_4O_6$?

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