The standard reduction potentials at 298 K for the following half reactions are given-Zn2-aq - 2e- - Zns E- -0-762 VCr3-aq - 3e- - Crs E- -0-740 V2H-aq - 2e- - H2g E- 0-000 VFe3-aq - e- - Fe2-s E- 0-770 VWhich is the strongest reducing agent-

E^∘_OP for Zn=+0.762 V (maximum amongst the given values) More the value of nbsp;E^∘_OP, more is the tendency for the species to get oxidised, and hence the ...

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Standard XII

Chemistry

Electrochemical Series

The standard ...

Question

The standard reduction potentials at 298 K for the following half reactions are given,

$Z n_{(a q)}^{2 +} + 2 e^{-} ⇌ Z n_{(s)}$ $E^{\circ}$ = $- 0.762 V$

$C r_{(a q)}^{3 +} + 3 e^{-} ⇌ C r_{(s)}$ $E^{\circ}$ = $- 0.740 V$

$2 H_{(a q)}^{+} + 2 e^{-} ⇌ H_{2 (g)}$ $E^{\circ}$ = $0.000 V$

$F e_{(a q)}^{3 +} + e^{-} ⇌ F e_{(s)}^{2 +}$ $E^{\circ}$ = $0.770 V$

Which is the strongest reducing agent?

Z n_{(s)}

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C r_{(s)}

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H_{2 (g)}

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F e_{(a q)}^{2 +}

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Solution

The correct option is A $Z n_{(s)}$
$E_{O P}^{\circ}$ for $Z n = + 0.762 V$ (maximum amongst the given values)

More the value of $E_{O P}^{\circ}$ , more is the tendency for the species to get oxidised, and hence the strongest reducing agent.

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Similar questions

Q. The standard reduction potential at 298 K for following half reactions are given against each

Z n^{2 +} (a q) + 2 e^{-} ⇌ Z n (s); - 0.762

C r^{3 +} (a q) + 3 e^{-} ⇌ C r (s); - 0.740

2 H^{⨁} (a q) + 2 e^{-} ⇌ H_{2} (g); 0.000

F e^{3 +} (a q) + 3 e^{-} ⇌ F e^{2 +} (a q); 0.770

Which is the strongest reducing agent ?

Q. The standard reduction potentials at

25^{\circ} C

for the following half reactions are given against each;

Z n^{2 +} (a q .) + 2 e^{-} ⇌ Z n (s); - 0.762

C r^{3 +} (a q .) + 3 e^{-} ⇌ C r (s); - 0.740

2 H^{+} + 2 e^{-} ⇌ H_{2} (g); 0.00

F e^{3 +} + e^{-} ⇌ F e^{2 +}; 0.77

Which is the strongest reducing agent?

Q. The standard reduction potentials at

298 K

for the following half reactions are given against each. Which will be the strongest reducing agent,among the following:

Z n^{2 +} (a q) + 2 e^{-} ⇌ Z n (s) - 0.762 C r^{3 +} (a q) + 3 e ⇌ C r (s) - 0.740 2 H^{+} (a q) + 2 e^{-} ⇌ H_{2} (g) 0.00 F e^{3 -} (a q) + e^{-} ⇌ F e^{2 +} (a g) 0.770

Q. The standard reduction potentials at 298 K for the following half reactions are given:

Which is the strongest reducing agent?

Z n^{2 +} (a q .) + 2 e ⇌ Z n (s); - 0.762

C r^{3 +} (a q) + 3 e ⇌ C r (s); - 0.740

2 H^{+} (a q) + 2 e ⇌ H_{2} (g); 0.00

F e^{3 +} (a q) + e ⇌ F e^{2 +} (a q); 0.770

Q. The standard reduction potentials at

298 K

for the following half-cell reactions are given by

{Z n}^{2 +} (a q) + 2 e^{-} ⇌ Z n (s) - 0.762

{C r}^{3 +} (a q) + 3 e^{-} ⇌ C r (s) - 0.74

2 H^{+} (a q) + 2 e^{-} ⇌ H_{2} (g) + 0.00

{F e}^{3 +} (a q) + e^{-} ⇌ {F e}^{2 +} (a q) + 0.77

Which one of the following is the strongest reducing agent?

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The standard reduction potentials at 298 K for the following half reactions are given, Zn2+(aq)+2e−⇌Zn(s) E∘= −0.762 V Cr3+(aq)+3e−⇌Cr(s) E∘= −0.740 V 2H+(aq)+2e−⇌H2(g) E∘= 0.000 V Fe3+(aq)+e−⇌Fe2+(s) E∘= 0.770 V Which is the strongest reducing agent?

The correct option is A Zn(s)E∘OP for Zn=+0.762 V (maximum amongst the given values) More the value of E∘OP, more is the tendency for the species to get oxidised, and hence the strongest reducing agent.

The correct option is A $Z n_{(s)}$
$E_{O P}^{\circ}$ for $Z n = + 0.762 V$ (maximum amongst the given values)

More the value of $E_{O P}^{\circ}$ , more is the tendency for the species to get oxidised, and hence the strongest reducing agent.