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JEE Advanced levelSingle correct optionDifficulty 3 of 3bn075

Use the electronegativity order F > O > Cl > Br > I. In which pair is the oxidation number of the two named atoms the same?

ACl in $Cl X_{2} O$ and Cl in $ClO X_{2}$
BCl in $ICl$ and Cl in $NaOCl$
CBr in $BrF X_{5}$ and Cl in $ClO X_{2}$
DI in $ICl$ and Cl in $Cl X_{2} O$

Answer: D

I in

ICl

is

+ 1

(Cl is more electronegative); Cl in

Cl X_{2} O

is

+ 1

. Others: Cl

+ 1

vs

+ 4

; Cl

- 1

vs

+ 1

; Br

+ 5

vs Cl

+ 4

. Only the first pair matches.

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