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A salt solution reacts with some drops o...

A salt solution reacts with some drops of chloroform and the mixture is shaken with chlorine water. The chloroform layer becomes violet. Salt solution contains:

A

`Cl^(-)`

B

`I^(-)`

C

`NO_(3)^(-)`

D

`S^(2-)`

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The correct Answer is:
B
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A salt mixture contains anions A^(-) & B^(-) . To the sodium carbonate extract of the mixture & dil. HCl. Two drops of chlorine water and 2-3 ml of chloroform are added and the mixture shaken. A violet colour is produced. The addition of chlorine water is continued till the violet colour disappears and a reddish brown colour appears. The anions are

When chlorine water is added to an aqueous solution of potassium halide in the presence of chloroform, a violet colour is obtained on adding more of chlorine water, the violet colour disappears, and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution

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