Redox Reactions NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Redox Reactions MCQ Questions


7.
According to the electronic concept, oxidation is:
A.
Loss of electrons by a species
B.
Addition of hydrogen
C.
Removal of oxygen
D.
Gain of electrons by a species
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ANSWER :
A. Loss of electrons by a species
8.
In the reaction 2Na + Cl₂ → 2NaCl, the oxidation half reaction is:
A.
2Cl⁻ → Cl₂ + 2e⁻
B.
2Na⁺ + 2e⁻ → 2Na
C.
2Na → 2Na⁺ + 2e⁻
D.
Cl₂ + 2e⁻ → 2Cl⁻
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ANSWER :
C. 2Na → 2Na⁺ + 2e⁻
9.
An oxidising agent is a species that:
A.
Donates electrons to another species
B.
Is itself oxidised
C.
Accepts electrons from another species
D.
Has lower electron affinity
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ANSWER :
C. Accepts electrons from another species
10.
A reducing agent is a species that:
A.
Is itself reduced
B.
Accepts electrons from another species
C.
Donates electrons to another species
D.
Has high electron affinity
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ANSWER :
C. Donates electrons to another species
11.
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, electrons flow from:
A.
Cu²⁺ to Zn
B.
Zn²⁺ to Cu
C.
Cu to Zn²⁺
D.
Zn to Cu²⁺
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ANSWER :
D. Zn to Cu²⁺
12.
Which is true for the reaction 2Na + H₂ → 2NaH?
A.
Both are oxidised
B.
Na is oxidised, H is reduced (forms H⁻)
C.
No redox change occurs
D.
Na is reduced, H is oxidised
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ANSWER :
B. Na is oxidised, H is reduced (forms H⁻)