First slide

Activity Series (OR) Electro chemicals series

Question

Which reaction is not feasible ?

Easy

A

$\large 2KI\, + \,B{r_2}\, \to \,2KBr\, + \,{I_2}$
B

$2KBr\, + \,{I_2}\, \to \,2KI\, + \,B{r_2}$
C

$2KBr\, + \,C{l_2}\, \to \,2KCl + \,B{r_2}$
D

$2{H_2}O\, + \,2{F_2}\, \to \,4HF\, + \,{O_2}$

Solution

A non metal electrode with higher SRP displaces non metal electrode with lower SRP.
SRP order
$E_{{F_{2/{F^ - }}}}^o > E_{C{l_2}/C{l^ - }}^o > E_{{O_2}/{H_2}O}^o > E_{B{r_2}/B{r^ - }}^o > E_{{I_2}/{I^ - }}^o$
Tendency to undergo reduction is F₂> Cl₂> O₂ > Br₂ > I₂

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