1.

In the iodometric estimation in laboratory, which process is involved

Answer»

`Cr_(2)O_(7)^(2-)+H^(+)+I^(-)to2Cr^(3)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`
`MnO_(4)^(-)+H^(+)+I^(-)toMnO_(2)+I_(2)`
`I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`
`MnO_(4)^(-)+OH^(-)+I^(-)toMnO_(2)+I_(2)`
`I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`
`Cr_(2)O_(7)^(2-)+OH^(-)+I^(-)to2Cr^(3+)+I_(2)`
`I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`

ANSWER :B


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