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Chemistry
Oxidation-number of sulphur in Caros acid is :
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Q. Oxidation-number of sulphur in Caros acid is :
WBJEE
WBJEE 2007
A
$+6$
B
$+4$
C
$+8$
D
$+7$
Solution:
Caros acid is $H _{2} SO _{5} .$ It has a peroxide linkage, so, oxidation of $S$ is
Let the oxidation state of $S$ is $x$
$H_{2} S O_{5}$ (one peroxide bond)
$+2+x+3(-2)+1(-2)=0$
$2+x-6-2=0$
$x-6=0$
$x=6$
