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In organic layer test, CS(2) or C CI(4) ...

In organic layer test, `CS_(2)` or `C CI_(4)` is added to Lassaigne's extract and then `Cl_(2)` water or `KMnO_(4)` is added. This test is used to distinguish between

A

`Br^(-)` and `I^(-)`

B

`Cl^(-)` and `Br^(-)`

C

`Cl^(-)` and `I^(-)`

D

`Cl^(-), Br^(-)` and `I^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Appearance of orange colour in organic layer confirms the presence of Br while violet color confirms iodine
`2Br^(-)+Cl_(2) to underset("orange")(Br_(2))+2Cl^(-)`
`2I^(-)+Cl_(2) to underset("(violet)")(I_(2))+2Cl^(-)`
`16H^(o+)+2MnO_(4)^(-)+10Br^(-) to 5Br_(2)+2Mn^(2+)+8H_(2)O`
`16H^(o+)+2MnO_(4)^(-)+10I^(-) to 5I_(2)+2Mn^(2+)+8H_(2)O`
Here `Cl_(2)` (or) `KMnO_(4)` works as oxidizing agent
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