. WhenC12 water is added to an aqueous solution


of potassium halide in presence of chloro form a violet colour is obtained on adding more ofC12  water

; the violet colour disappears and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution :

A: Iodide

B: Bromide

C: Chloride

D: Bromide and chloride

 

Best Answer

Explanation:

When the reagent is introduced dropwise to an iodide solution, free iodine is liberated, which turns the solution brown and dissolves in

the organic layer, generating a violet solution that sinks below the aqueous layer after shaking with .CS2,CHC13 or CC14

2KI + C12 → I2+ 2KC1

I2 + Chloroform → Violet solution

Hence, the test confirms the presence of iodide in the aqueous solution.

Final answer:

The correct option is A, i.e. iodide.

 

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