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Question

The oxidation state of the underlined element in the given compound is:
Ruā€“ā€“ā€“ā€“O4

A
8
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B
6
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C
4
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D
none of these
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Solution

The correct option is A 8
RuO4 oxidation state be x
Then, x+4(2)=0
x8=0
x=+8

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