Electrochemistry - Result Question 8

####8. Given, $E _{Cl _2 / Cl^{-}}^{\circ}=1.36 V, E _{Cr^{3+} / Cr}^{\circ}=-0.74 V$

$E _{Cr _2 O _7^{2-} / Cr^{3+}}^{\circ}=1.33 V, E _{MnO _4^{-} / Mn^{2+}}^{\circ}=1.51 V$

Among the following, the strongest reducing agent is

(2017 Main)

(a) $Cr$

(b) $Mn^{2+}$

(c) $Cr^{3+}$

(d) $Cl^{-}$

Show Answer

Answer:

Correct Answer: 8. (b)

(a)

Solution:

  1. The substances which have lower reduction potentials are stronger reducing agents. Therefore, $Cr\left(E _{Cr^{3+} / Cr}^{\circ}=-0.74 V\right)$ is the strongest reducing agent among all the other given options.


जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक