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JEE Advanced levelSingle correct optionDifficulty 3 of 3rx042

Which one of the following reactions is NOT a redox reaction?

A $Cl X_{2} + H X_{2} O HCl + HOCl$
B $ICl + H X_{2} O HOI + HCl$
C $2 KO X_{2} + 2 H X_{2} O 2 KOH + H X_{2} O X_{2} + O X_{2}$
D $CaH X_{2} + 2 H X_{2} O Ca (OH) X_{2} + 2 H X_{2}$

Answer: B

In

ICl

, I is

+ 1

and Cl is

- 1

; in

HOI

, I is

+ 1

, and in HCl, Cl is

- 1

, so nothing changes.

Cl X_{2}

goes to

- 1

and

+ 1

; in

KO X_{2}

, O (

- 1/2

) goes to

0

and

- 1

; and hydride H and water H both go to 0.

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