Question

When BrO3
^- ion reacts with Br–

in acid medium, Br2 is liberated. The equivalent weight of Br2 in this

reaction is :

(A) 5M
/8
(B) 5M
/3
(C) 3M
/5
(D) 4M/5

Answer 1

Heya HERE is your answer

3M/5

HOPE IT helps you

Answer 2

Answer: The correct option is C.

Explanation: For the given disproportionation or redox reaction in acidic medium, reaction follows:

$BrO_3^-+5Br^-+6H^+\rightarrow 3Br_2+3H_2O$

Equivalent weight in this reaction is defined as the molar mass divided by the n-factor

n-factor is the number of electrons lost and gained in disproportionation reaction. The number of these two should be same.

For the above reaction, n-factor = 5

$\text{Equivalent weight}=\frac{M}{n}$

As 3 moles of $Br_2$ are produced in the reaction

Mass of $Br_2$ = 3M

Therefore, $\text{Equivalent weight of }Br_2=\frac{3M}{5}$

Hence, the correct option is C.