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During the titration of sodium thiosulph...

During the titration of sodium thiosulphate and iodien, the following reaction takes place :
`2Na_2 S_2O_3 + I_2 to Na_2 S_4 O_6 + 2NaI`
Which of the following statement is correct ?

A

Sodium thiosuphate gets oxidised because oxidation number of S in it increases from + 2 to + 4.

B

Oxidation number of S increases by 0.5 while that iodine decreases by -1.

C

Iodine behaves as reducing agent because its oxidation number inreases.

D

The product `Na_2S_4O_6` is sodium hexathionate and oxidation number of S in it is 2.5.

Text Solution

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The correct Answer is:
B
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