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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3rx051

Which of the following contain a peroxide (O-O) linkage? Select all correct options.

A $H X_{2} S X_{2} O X_{8}$
B $H X_{2} SO X_{5}$
C $H X_{2} S X_{2} O X_{7}$
D $Na X_{2} S X_{2} O X_{8}$

Answer: A, B, D

H X_{2} S X_{2} O X_{8}

and

Na X_{2} S X_{2} O X_{8}

each have one O-O unit between the two sulfonate halves.

H X_{2} SO X_{5}

(Caro's acid) has

- O - OH

.

H X_{2} S X_{2} O X_{7}

has an S-O-S bridge only, so S is

+ 6

with every O at

- 2

.

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