Question

Which reaction is not feasible?

• A. $2KI + Br_2 \rightarrow 2KBr + I_2$
• B. $2KBr + I_2 \rightarrow 2KI + Br_2$
• C. $2KBr +Cl_2 \rightarrow 2KCl + Br_2$
• D. $2H_2O+ 2F_2 \rightarrow 4HF +O_2$

Answer 1

Answer: (B)

$2KBr + I_2 2KI + Br_2$ reaction is not possible because $Br^-$ ion is not oxidised in $Br_2$ with $I_2$ due to higher electrode (oxidation) potential of $I_2$ than bromine.