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JEE Main levelSingle correct optionDifficulty 2 of 3pn190

Ozone is bubbled through a neutral aqueous solution of potassium iodide. The products and the effect on litmus are

A $I X_{2}$ , $O X_{2}$ and $HI$ ; blue litmus turns red
B $I X_{2}$ , $O X_{2}$ and $KOH$ ; red litmus turns blue
C $KIO X_{3}$ and $O X_{2}$ ; no change in litmus
D $I X_{2}$ and $H X_{2}$ ; no change in litmus

Answer: B

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

. The

KOH

formed makes the solution alkaline, so red litmus turns blue.

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