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Redox Reactions question

2023 · 1 Feb · Shift 1 · Q17

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Redox Reactions
2023 · 1 Feb · Shift 1 · Q17

Redox Reactions question

2023 · 1 Feb · Shift 1 · Q17

JEE MainChemistryRedox ReactionsNumerical+4 / −1

Sum of oxidation states of bromine in bromic acid and perbromic acid is

\underline{\hspace{2cm}}

.

Numerical answer

View written solutionFree

Correct answer: 12

Find oxidation state of Br in bromic acid, $\mathrm{HBrO_3}$

Let the oxidation state of bromine be $x$ .

Using the rule that the sum of oxidation states in a neutral molecule is zero:

(+1) + x + 3(-2) = 0

1 + x - 6 = 0

x - 5 = 0

x = +5

So, oxidation state of Br in $\mathrm{HBrO_3}$ is $+5$ .

Find oxidation state of Br in perbromic acid, $\mathrm{HBrO_4}$

Let the oxidation state of bromine be $y$ .

Again, for a neutral molecule:

(+1) + y + 4(-2) = 0

1 + y - 8 = 0

y - 7 = 0

y = +7

So, oxidation state of Br in $\mathrm{HBrO_4}$ is $+7$ .

Find the required sum

(+5) + (+7) = 12

Therefore, the required sum is:

\boxed{12}

Comparison with stored correct answer

Stored correct answer = $12$

Our derived answer = $12$

Hence, they agree.

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