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General Principles and processes of Isolation of Elements
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The oxidation number of the underlined atom in the following species Identify the incorrect option.
A
$HAuCl _{4}$ is $+3$
B
$Cu _{2} O$ is $-1$
C
$ClO _{3}^{-}$ is $+5$
D
$K _{2} Cr _{2} O _{7}$ is $+6$
(NEET-2020)
Solution
(1) $HAuCl _{4} \Rightarrow(+1)+ x +4(-1)=0$ $x=+3$
(2) $Cu _{2} \underline{ O } \Rightarrow 2(+1)+ x =0$ $x=-2$
(3) $\underline{C} \mid O _{3}^{-} \Rightarrow x +3(-2)=-1$ $x=+5$
(4) $K _{2} \underline{ Cr _{2} O _{7}} \Rightarrow 2(+1)+2 x +7(-2)=0$ $x=+6$
Standard 12
Chemistry
