Redox Reactions NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Redox Reactions MCQ Questions


7.
Redox reactions involve
A.
Only reduction
B.
Only oxidation
C.
Transfer of electrons
D.
Exchange of protons
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ANSWER :
C. Transfer of electrons
8.
The oxidizing agent is the species that
A.
Gains electrons
B.
Loses electrons
C.
Remains unchanged
D.
Is reduced
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ANSWER :
A. Gains electrons
9.
Oxidation number of oxygen in peroxides is
A.
-2
B.
-1
C.
0
D.
1
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ANSWER :
B. -1
10.
Which of these is a redox couple?
A.
H₂O/H₂
B.
O₂/N₂
C.
NH₄⁺/NH₃
D.
CH₄/CO₂
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ANSWER :
A. H₂O/H₂
11.
What is the oxidation number of nitrogen in NH₃?
A.
3
B.
-3
C.
0
D.
1
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ANSWER :
B. -3
12.
Oxidation state of Cr in K₂Cr₂O₇ is
A.
6
B.
3
C.
4
D.
2
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ANSWER :
A. 6