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Consider the redox reaction 2S(2)O(3)^...

Consider the redox reaction
`2S_(2)O_(3)^(2-)+I_(2)rarrS_(4)O_(6)^(2-)+2I^(ө)`

A

`M_(1),M_(2)`

B

`M_(1),M_(2)//2`

C

`2M_(1),M_(2)`

D

`M_(1),2M_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`overset(+2)(2NaS_(2)O_(4))-=Na_(2)overset(+2.5)(S_(4))O_(6)`
Total increase in O.N of S for two molecules of `Na_(2)S_(2)O_(3)=4xx2.5-2[2(+2)]=2`
`:.` Total increase in O.N of S per molecule of `Na_(2)S_(2)O_(3)=1`
Eq. mass = `M_(1)//1=M_(1)`
Now `I_(2)^(@)rarr2I^(-2)`
Total decrease in O.N per molecule of `I_(2)`
`=0-2 (-1)=2`
`=0-2 (0-1) =2`
`:.` Eq. mass `I_(2) = M_(2)//2`.
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