A) \[KMn{{O}_{4}}\]
B) hypo
C) \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
D) none of these
Correct Answer: B
Solution :
The reagent used to estimate iodine is hypo \[\underset{hypo}{\mathop{2{{S}_{2}}O_{3}^{-2}}}\,+{{I}_{2}}\xrightarrow[{}]{{}}{{S}_{4}}O_{6}^{-2}+2{{I}^{-}}\]
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