All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that

Question

All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that (A) S2O82 ->Cr2O72 ->MnO4- (B) MnO4->Cr2O72 ->S2O82 - (C) S2O82 ->MnO4->Cr2O72 - (D) MnO4->S2O82 ->Cr2O72 -

Tardigrade Admin · Accepted Answer

The standard reduction potentials of the above species in acidic medium are as given below

S_{2} O_{8}^{2 -} (a q) + 2 e^{-} \to 2 S O_{4}^{2 -} (a q); E^{\circ} = + 2.01 V

M n O_{4}^{-} (a q) + 8 H^{+} + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O; E^{\circ} = + 1.77 V

C r_{2} O_{7}^{2 -} (a q) + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O; E^{\circ} = + 1.33 V

The more the standard reduction potential, the more the tendency of the species to undergo reduction and more strongly it (species) would work as oxidizing agent.
As a result, their strength as oxidizing agent in acidic solution decreases in the following order

S_{2} O_{8}^{2 -} > M n O_{4}^{-} > C r_{2} O_{7}^{2 -}

Q. All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that

$S_{2} O_{8}^{2 -} > C r_{2} O_{7}^{2 -} > M n O_{4}^{-}$

$M n O_{4}^{-} > C r_{2} O_{7}^{2 -} > S_{2} O_{8}^{2 -}$

$S_{2} O_{8}^{2 -} > M n O_{4}^{-} > C r_{2} O_{7}^{2 -}$

$M n O_{4}^{-} > S_{2} O_{8}^{2 -} > C r_{2} O_{7}^{2 -}$

Q. All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that

S2​O82−​>Cr2​O72−​>MnO4−​

MnO4−​>Cr2​O72−​>S2​O82−​

S2​O82−​>MnO4−​>Cr2​O72−​

MnO4−​>S2​O82−​>Cr2​O72−​

$S_{2} O_{8}^{2 -} > C r_{2} O_{7}^{2 -} > M n O_{4}^{-}$

$M n O_{4}^{-} > C r_{2} O_{7}^{2 -} > S_{2} O_{8}^{2 -}$

$S_{2} O_{8}^{2 -} > M n O_{4}^{-} > C r_{2} O_{7}^{2 -}$

$M n O_{4}^{-} > S_{2} O_{8}^{2 -} > C r_{2} O_{7}^{2 -}$