Fuel Cells NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Fuel Cells MCQ Questions


1.
A fuel cell is best defined as:
A.
A primary cell that uses solid fuels and gets discharged
B.
An electrolytic cell that stores electrical energy as chemical energy
C.
A galvanic cell in which the chemical energy of combustion of a fuel is directly converted into electrical energy
D.
A device that converts heat directly into mechanical energy
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ANSWER :
C. A galvanic cell in which the chemical energy of combustion of a fuel is directly converted into electrical energy
2.
Fuel cells differ from ordinary galvanic cells in that:
A.
They use solids as electrodes which themselves get oxidised
B.
They cannot supply current for long durations
C.
They use a salt bridge instead of an electrolyte
D.
Reactants (fuel and oxidant) are continuously supplied from outside
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ANSWER :
D. Reactants (fuel and oxidant) are continuously supplied from outside
3.
Which one of the following is the most commonly cited example of a fuel cell?
A.
Lead storage battery
B.
Hydrogen-oxygen fuel cell
C.
Dry cell (Leclanché cell)
D.
Daniell cell
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ANSWER :
B. Hydrogen-oxygen fuel cell
4.
In a hydrogen-oxygen fuel cell, the fuel is:
A.
Hydrogen (H₂)
B.
Water (H₂O)
C.
Oxygen (O₂)
D.
Methane (CH₄)
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ANSWER :
A. Hydrogen (H₂)
5.
In a hydrogen-oxygen fuel cell, the oxidant is:
A.
Carbon dioxide (CO₂)
B.
Oxygen (O₂)
C.
Potassium hydroxide (KOH)
D.
Hydrogen (H₂)
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ANSWER :
B. Oxygen (O₂)
6.
In the H₂-O₂ fuel cell, the electrodes are usually made of:
A.
Zinc rod and copper rod
B.
Porous carbon impregnated with a catalyst (Pt, Pd or finely divided metals)
C.
Graphite rod and MnO₂ paste
D.
Solid lead and lead dioxide plates
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ANSWER :
B. Porous carbon impregnated with a catalyst (Pt, Pd or finely divided metals)