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In the reaction, l(2) + 2S(2)O(3)^(2-) r...

In the reaction, `l_(2) + 2S_(2)O_(3)^(2-) rarr 2l^(-) + S_(4) O_(6)^(2-)`, equivalent weight of iodine will be equal to

A

M

B

`M//2`

C

`M//4`

D

`2M`

Text Solution

Verified by Experts

The correct Answer is:
B
`l_(2)^(0) + 2S_(2)O_(3)^(2-) rarr overset(-1)(2l^(-)) + S_(4)O_(6)^(2-)`
`:.` Decrease in ON of iodine per atom `=1`
`:.` Decrease in ON of iodine per molecule `= 2 xx 1 = 2` Hence, equivalent weight of iodine
`("Molecular weight of iodine")/("Total decrease in ON of iodine per molecule") = (M)/(2)`
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