Question

Standard potentials (Eº) for some half-reactions
are given below :
(1) Sn⁴⁺+ 2e ⟶ Sn²⁺ ;Eº = +0.15 V
(2) 2Hg²⁺+2e⟶ Hg₂²⁺ ;Eº 0.92 V
(3) PbO₂ + 4H⁺+2e ⟶ Pb²⁺+ 2H₂O ; Eº = +1.45 V
Based on the above, which one of the following
statements is correct ?
(a) Sn⁴⁺ is a stronger oxidising agent than Pb⁴⁺
(b) Sn²⁺ is a stronger reducing agent than Hg₂²⁺
(c) Hg²⁺ is a stronger oxidising agent than Pb⁴⁺
(d) Pb²⁺ is a stronger reducing agent than Sn²⁺

Answer 1

option (b) is correct

(b) Sn²⁺ is a stronger reducing agent than Hg₂²⁺

•It is clear that reduction potential are given

•Now , if reduction potential

decreases

•Tendency to get reduced

decreases

• Tendency to get oxidized

increases

•Tendency to act as reducing agent

increases

•Tendency to act as oxidizing agent

decreases

• (a) Sn⁴⁺ is not stronger oxidising

agent than Pb⁴⁺ because

reduction potential of Sn⁴⁺ less

• (b) Sn²⁺ is a stronger reducing

agent than Hg₂²⁺ because

oxidation oxidation potential of

Sn²⁺ is more than that of Hg₂²⁺.

•(c) Hg²⁺ is not a stronger oxidising

agent than Pb⁴⁺ because reduction potential of Pb⁴⁺ is more.

•Pb²⁺ is not a stronger reducing

agent than Sn²⁺ because

oxidation oxidation potential of

Sn²⁺ is more.

Answer 2

Answer:

B

Explanation:

QwapartmentAmbitious

option (b) is correct

(b) Sn²⁺ is a stronger reducing agent than Hg₂²⁺

•It is clear that reduction potential are given

•Now , if reduction potential

decreases

•Tendency to get reduced

decreases

• Tendency to get oxidized

increases

•Tendency to act as reducing agent

increases

•Tendency to act as oxidizing agent

decreases

• (a) Sn⁴⁺ is not stronger oxidising

agent than Pb⁴⁺ because

reduction potential of Sn⁴⁺ less

• (b) Sn²⁺ is a stronger reducing

agent than Hg₂²⁺ because

oxidation oxidation potential of

Sn²⁺ is more than that of Hg₂²⁺.

•(c) Hg²⁺ is not a stronger oxidising

agent than Pb⁴⁺ because reduction potential of Pb⁴⁺ is more.

•Pb²⁺ is not a stronger reducing

agent than Sn²⁺ because

oxidation oxidation potential of

Sn²⁺ is more.

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