The standard reduction potential at 298 K for following half reactions are given against each Zn2+(aq)+2e−⇌Zn(s);−0.762 Cr3+(aq)+3e−⇌Cr(s);−0.740 2H⨁(aq)+2e−⇌H2(g);0.000 Fe3+(aq)+3e−⇌Fe2+(aq);0.770 Which is the strongest reducing agent ?
Zn(s)
Cr(s)
H2(s)
Fe2+(aq)
A
Zn(s)
B
Fe2+(aq)
C
Cr(s)
D
H2(s)
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Solution
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Zn is the strongest reducing agent among the given options. The substance having a smaller value of reduction potential are better-reducing agents.
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Similar Questions
Q1
The standard reduction potential at 298 K for following half reactions are given against each Zn2+(aq)+2e−⇌Zn(s);−0.762 Cr3+(aq)+3e−⇌Cr(s);−0.740 2H⨁(aq)+2e−⇌H2(g);0.000 Fe3+(aq)+3e−⇌Fe2+(aq);0.770 Which is the strongest reducing agent ?
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Q2
The standard reduction potentials at 298 K for the following half reactions are given against each Zn2+(aq)+2e⇌Zn(s)−0.762 Cr3+(aq)+2e⇌Cr(s)−0.740 2H+(aq)+2e⇌H2(g)0.000 Fe3+(aq)+2e⇌Fe2+(aq)0.770 Which is the strongest reducing agent?
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Q3
The standard reduction potentials at 298 K for the following half reactions are given,
Zn2+(aq)+2e−⇌Zn(s)E∘= −0.762V
Cr3+(aq)+3e−⇌Cr(s)E∘= −0.740V
2H+(aq)+2e−⇌H2(g)E∘= 0.000V
Fe3+(aq)+e−⇌Fe2+(s)E∘= 0.770V
Which is the strongest reducing agent?
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Q4
The standard reduction potentials at 25∘C for the following half reactions are given against each; Zn2+(aq.)+2e−⇌Zn(s);−0.762 Cr3+(aq.)+3e−⇌Cr(s);−0.740 2H++2e−⇌H2(g);0.00 Fe3++e−⇌Fe2+;0.77 Which is the strongest reducing agent?
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Q5
The standard reduction potentials at 298K for the following half reactions are given against each: