Electrochemical Cells (Electrolytic and Galvanic Cells, Different Types of Electrodes,...) NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Electrochemical Cells (Electrolytic and Galvanic Cells, Different Types of Electrodes,...) MCQ Questions


1.
Which of the following is the correct distinction between a galvanic cell and an electrolytic cell?
A.
Galvanic cell uses external EMF; electrolytic cell does not.
B.
Both cells convert electrical energy into chemical energy.
C.
Galvanic cell has anode positive; electrolytic cell has anode negative.
D.
Galvanic cell converts chemical energy into electrical energy; electrolytic cell converts electrical energy into chemical energy.
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ANSWER :
D. Galvanic cell converts chemical energy into electrical energy; electrolytic cell converts electrical energy into chemical energy.
2.
In a galvanic cell, oxidation occurs at the:
A.
Anode (negative electrode)
B.
Cathode (positive electrode)
C.
Anode (positive electrode)
D.
Cathode (negative electrode)
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ANSWER :
A. Anode (negative electrode)
3.
In an electrolytic cell, the cathode is connected to:
A.
The positive terminal of the battery
B.
No external connection is needed
C.
Either terminal can be used
D.
The negative terminal of the battery
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ANSWER :
D. The negative terminal of the battery
4.
The standard electrode potential of an electrode is measured under conditions of:
A.
Any concentration at 298 K and 1 atm pressure
B.
0.1 M concentration, 1 atm pressure, and 273 K
C.
1 M concentration, 2 atm pressure, and 298 K
D.
1 M concentration, 1 atm pressure, and 298 K
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ANSWER :
D. 1 M concentration, 1 atm pressure, and 298 K
5.
The reference electrode used for measuring standard electrode potentials is:
A.
Glass electrode
B.
Calomel electrode
C.
Standard Hydrogen Electrode (SHE)
D.
Silver-silver chloride electrode
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ANSWER :
C. Standard Hydrogen Electrode (SHE)
6.
The half-cell reaction at the SHE during reduction is:
A.
H⁺(aq) + e⁻ → ½H₂(g)
B.
2H₂O → O₂ + 4H⁺ + 4e⁻
C.
2H⁺(aq, 1 M) + 2e⁻ → H₂(g, 1 atm)
D.
H₂(g) → 2H⁺(aq) + 2e⁻
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ANSWER :
C. 2H⁺(aq, 1 M) + 2e⁻ → H₂(g, 1 atm)