In the reaction: 3 B r 2 + 6 C O 3 2 − + 3 H 2 O → 5 B r − + B r O 3 − + 6 H C O 3 −

(0) (+4) (-1) (+5) (+4) 3 Br 2 + 6 CO 3 2 − + 3 H 2 O → 5 Br − + BrO 3 − + 6 HCO 3 − Bromine is oxidised as well as reduced Ans: D

Chemistry - Redox Reactions Question with Solution | TestHub

ChemistryRedox ReactionsDetermination of Oxidation StateMedium2 minQB

ChemistryMediumsingle choice

Passage / Comprehension

Oxidation and reduction reactions occuring simultaneously are called redox reactions. Oxidation involves loss of electrons while reduction involves gain of electrons. As a result, oxidation number of an atom increases during oxidation and decreases during reduction. The redox reaction may involve combination of atoms or molecules, displacement of metals or non-metals and disproportionation reactions. Redox reactions may be balanced by oxidation number method or ion-electron method.

In the reaction:

$3 B r_{2} + 6 C O_{3}^{2 -} + 3 H_{2} O \to 5 B r^{-} + B r O_{3}^{-} + 6 H C O_{3}^{-}$

Options:

Answer:

Solution:

(0) (+4) (-1) (+5) (+4)

$3 Br_{2} + 6 CO_{3}^{2 -} + 3 H_{2} O \to 5 Br^{-} + BrO_{3}^{-} + 6 HCO_{3}^{-}$

Bromine is oxidised as well as reduced

Ans: D

Stream:JEESubject:ChemistryTopic:Redox ReactionsSubtopic:Determination of Oxidation State

⏱ 2mℹ️ Source: QB

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