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Question

The standard reduction potential at 298 K for following half reactions are given against each
Zn2+(aq)+2eZn(s);0.762
Cr3+(aq)+3eCr(s);0.740
2H(aq)+2eH2(g);0.000
Fe3+(aq)+3eFe2+(aq);0.770
Which is the strongest reducing agent ?
  1. Zn(s)
  2. Cr(s)
  3. H2(s)
  4. Fe2+(aq)

A
Zn(s)
B
Fe2+(aq)
C
Cr(s)
D
H2(s)
Solution
Verified by Toppr

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)+2eZn(s);0.762
Cr3+(aq)+3eCr(s);0.740
2H(aq)+2eH2(g);0.000
Fe3+(aq)+3eFe2+(aq);0.770
Which is the strongest reducing agent ?
View Solution
Q2
The standard reduction potentials at 298 K for the following half reactions are given against each
Zn2+(aq)+2eZn(s) 0.762
Cr3+(aq)+2eCr(s) 0.740
2H+(aq)+2eH2(g) 0.000
Fe3+(aq)+2eFe2+(aq) 0.770
Which is the strongest reducing agent?
View Solution
Q3
The standard reduction potentials at 298 K for the following half reactions are given,

Zn2+(aq)+2eZn(s) E= 0.762 V

Cr3+(aq)+3eCr(s) E= 0.740 V

2H+(aq)+2eH2(g) E= 0.000 V

Fe3+(aq)+eFe2+(s) E= 0.770 V

Which is the strongest reducing agent?
View Solution
Q4
The standard reduction potentials at 25C for the following half reactions are given against each;
Zn2+(aq.)+2eZn(s);0.762
Cr3+(aq.)+3eCr(s);0.740
2H++2eH2(g);0.00
Fe3++eFe2+;0.77
Which is the strongest reducing agent?
View Solution
Q5
The standard reduction potentials at 298 K for the following half reactions are given against each:

Zn2+(aq)+2eZn(s);0.762 V
Cr3+(aq)+3eCr(s);0.740 V
2H+(aq)+2eH2(g);0.00 V
Fe3+(aq)+eFe2+(aq);0.770 V

Which is the strongest reducing agent?

View Solution