Question

Given that : $E _{ O _2 H _2 O }^{\circ}=+1 \cdot 23 V$
$E _{ S _2 O _8^{2-}/ SO _4^{2-}}^{\circ} =+2 \cdot 05 V$
$E _{ Br _2 / Br ^{-}}^{\circ}=+1 \cdot 09 V$
$E _{ Au ^3 / Au }^{\circ}=+1 \cdot 4 V$
The strongest oxidizing agent is -

• A. $O_2$
• B. $Br_2$
• C. $S_2O_8^{2-}$
• D. $Au^{3+}$

Answer 1

Answer: (C)

For strongest oxidising agent, standard reduction potential should be highest.