JEE Chemistry 2023 Question with Solution

Given: Bromic acid is $\text{HBrO}_3$ and perbromic acid is $\text{HBrO}_4$.

Find: The sum of oxidation states of bromine in these two oxoacids.

For bromic acid, let the oxidation state of bromine be $x$.

Thus, the oxidation state of bromine in bromic acid is $+5$.

For perbromic acid, let the oxidation state of bromine be $x$.

Thus, the oxidation state of bromine in perbromic acid is $+7$.

Now, the required sum is

Therefore, the sum of oxidation states is $12$.

Given: The acids are $\text{HBrO}_3$ and $\text{HBrO}_4$.

Find: The sum of oxidation states of Br.

In oxoacids, take $\text{H} = +1$ and $\text{O} = -2$.

So for $\text{HBrO}_3$, bromine is $+5$, and for $\text{HBrO}_4$, bromine is $+7$.

Hence,

Therefore, the correct numerical answer is $12$.