MCQ
What is formed when Iodine is absorbed by hypo solutoin ?
- A$NaI_3$
- B$Na_4S_4O_6$
- C$Na_2S_4O_6$
- ✓$Na_3S_4O_6$

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$C$ is
$FeCr _{2} O _{4}+ Na _{2} CO _{3}+ O _{2} \rightarrow A + Fe _{2} O _{3}+ CO _{2}$
$A + H ^{+} \rightarrow B + H _{2} O + Na ^{+}$