How many of the following are oxidising agents?
$B r_{2}, F e^{3 +}, N O_{3}^{-}, I^{-}, N a$

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Solution

Oxidants : $B r_{2}, F e^{3 +}, N O_{3}^{-}$
$F e^{3 +} + e \to F e^{2 +}$
$N^{5 +} + 2 e \to N^{3 +}$
$B r_{2} + 2 e \to 2 B r^{-}$
Reductants : $I^{-}, N a$
$N a \to N a^{+} + e$
$2 I^{-} \to I_{2} + 2 e$

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