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Q.

When Cl2  water is added to an aqueous solution of potassium halide in presence of chloroform a violet colour is obtained. On adding more of Cl2  water, the violet colour disappears and a colorless solution is obtained. This test confirms presence of following in aqueous solution :

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a

Chloride

b

Bromide

c

Iodide

d

Iodide and bromide

answer is D.

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Detailed Solution

2KI+Cl2→I2+2KCl

I2+CCl4→  violet

I2+5Cl2(Excess)+6H2O→2HIO3+10HCl

          violet colour disappear

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