What is the oxidation state of bromine in $A l {B r}_{3}$ ?

- 1

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Solution

The correct option is A $- 1$
Oxidation state of $B r$ in $A l B r_{3} : + 3 + 3 x = 0$
$\Rightarrow 3 x = - 3$
$\Rightarrow x = - 1$ .

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