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JEE Mains · Chemistry · STD 12 - 2. Electrochemistry

दिया गया है, \(E _{ O _{2} / H _{2} O }^{\ominus}=+1.23 \,V\); \(E _{ S _{2} O _{8}^{2-} / SO _{4}^{2-}}^{\ominus}=2.05 \,V\); \(E _{ Br _{2} / Br ^{\ominus}}^{\Theta}=+1.09 \,V\); \(E _{ Au ^{\ominus}}^{\ominus} / Au =+1.4 \,V\) प्रबलतम उपचायक है :

  1. A \(O_2\)
  2. B \({S_2}O_8^{2 - }\)
  3. C \(Au^{3+}\)
  4. D \(Br_2\)
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Answer & Solution

Correct Answer

(B) \({S_2}O_8^{2 - }\)

Step-by-step Solution

Detailed explanation

For strongest oxidising agent, standard reduction potential should be highest. Peroxy oxygen \((-O -O-)\) is reduced to oxide \((O^{2-})\) in the change
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