p-Block elementsHardBloom L3

Question

When chlorine gas is passed through an aqueous solution of a potassium halide in the presence of chloroform, a voilet colouration is obtained. On passing more of chlorine water, the voilet colour is disappeared and solution becomes colourless. This test confirms the presence of .......... in aqueous solution.

Options

A.chlorine
B.fluorine
C.bromine
D.iodine

Solution

Sol. The potassium halide is potassium iodide.

2KI+Cl2​→2KCl+I2​

This test confirms the presence of I2​.

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