Which of the following shows highest oxidation number in combined state?

O s

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R u

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Both (1) & (2)

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None

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Solution

The correct option is B Both (1) & (2)
The possible oxidation states of $O s$ and $R u$ are :-
$O s \Rightarrow - 4, - 2, - 1, 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8$
$R u \Rightarrow - 4, - 2, 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8$
Therefore, both $O s$ and $R u$ show highest oxidation number of $+ 8$ .
Therefore, $(C)$ is the correct answer.

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R u = 44; O s = 76

Among the following outermost configuration of metals, which shows the highest oxidation state:

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