Thiosulphate reacts differently with iodine and bromine in the reaction given below:

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
Thiosulphate reacts differently with iodine and bromine in the reaction given below:

$2 S_{2} O_{3}^{2 -} + I_{2} \to S_{4} O_{6}^{2 -} + 2 I^{-}$

$S_{2} O_{3}^{2 -} + 5 {Br}_{2} + 5 H_{2} O \to 2 {SO}_{4}^{2 -} + 4 {Br}^{-} + 10 H^{+}$

Which of the following statement justifies the above dual behaviour of thiosulphate [2024]

1 Bromine is a weaker oxidant than iodine

2 Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions

3 Bromine undergoes oxidation and iodine undergoes reduction in these reactions

4 Bromine is a stronger oxidant than iodine

Ans.
(4)

$2 \overset{+ 2}{S_{2}} O_{3}^{2 -} + I_{2} \to \overset{+ 2.5}{S_{4}} O_{6}^{2 -} + 2 I^{-}$

$\overset{+ 2}{S_{2}} O_{3}^{2 -} + 5 {Br}_{2} + 5 H_{2} O \to 2 \overset{+ 6}{S} O_{4}^{2 -} + 4 {Br}^{-} + 10 H^{+}$

${Br}_{2}$ is oxidizing S of thiosulphate to a higher oxidation state than $I_{2} .$ This illustrates that ${Br}_{2}$ is a stronger oxidizing agent than $I_{2}$ .

Want Us to Email you About Special Offers & Updates?