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One mole of CaOCl(2) is dissolved in wat...

One mole of `CaOCl_(2)` is dissolved in water andexcess of `KI` added. `Hypo(Na_(2)S_(2)O_(3))` required to react with the oxidised part completely is

A

`1` mole

B

`2.0` moles

C

`1.5` moles

D

`2.5` moles

Text Solution

Verified by Experts

The correct Answer is:
B
`underset(1 mol)(CaOCl_(2))+H_(2)O rarr Ca(OH)_(2)+underset(1 mol)(Cl_(2))`
`Cl_(2)+2KI rarr 2KCl+underset(1 mol e)(I_(2))`
`I_(2)+KI hArr KI_(3)`
`I_(2)`(in `KI`) `+2Na_(2)S_(2)O_(3) rarr 2Nal+Na_(2)S_(4)O_(6)`
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