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NEET levelSingle correct optionDifficulty 1 of 3pn186

When ozone is passed through an aqueous solution of potassium iodide, the substance liberated that turns starch solution blue is

A $H X_{2}$
B $KIO X_{3}$
C $HI$
D $I X_{2}$

Answer: D

O X_{3} + 2 KI + H X_{2} O I X_{2} + 2 KOH + O X_{2}

. The liberated iodine forms a blue complex with starch.

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