Balancing of Redox Reactions NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Balancing of Redox Reactions MCQ Questions


13.
What is the reducing agent in: Zn + H₂SO₄ → ZnSO₄ + H₂?
A.
H₂SO₄
B.
ZnSO₄
C.
Zn
D.
H₂
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ANSWER :
C. Zn
14.
In the reaction: H₂O₂ → O₂, what is the oxidizing agent?
A.
H₂O₂
B.
O₂
C.
H⁺
D.
OH⁻
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ANSWER :
A. H₂O₂
15.
In basic medium, what is the balanced half-reaction for: MnO₄⁻ → MnO₂?
A.
3e⁻, 2OH⁻
B.
2e⁻, 4OH⁻
C.
2e⁻, 2OH⁻
D.
3e⁻, 4OH⁻
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ANSWER :
D. 3e⁻, 4OH⁻
16.
Balance Cr₂O₇²⁻ → Cr³⁺ in acid. What is the electron change per Cr₂O₇²⁻?
A.
3
B.
4
C.
5
D.
6
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ANSWER :
D. 6
17.
In acidic medium, how many water molecules are added to balance: Fe²⁺ → Fe³⁺?
A.
0
B.
1
C.
2
D.
3
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ANSWER :
A. 0
18.
Which element is oxidized in: 2Na + Cl₂ → 2NaCl?
A.
Na
B.
Cl
C.
NaCl
D.
None
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ANSWER :
A. Na