JEE Main Chemistry question
When water is added to an aqueous solution of a potassium halide in the presence of chloroform, a violet colour is obtained. On adding more water, the violet colour disappears and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution:
Answer: (A)
Solution
Chlorine oxidises to , which colours the chloroform layer violet. With excess chlorine, is further oxidised to a colourless species (such as or ), making the
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