Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spa B. has an efficiency of 40% to produ electricity…
Electrochemistry · Class 12 · JEE Main Previous Year Question
Fuel cell, using hydrogen and oxygen as fuels,
A. has been used in spa\ceship
B. has an efficiency of 40% to produ\ce electricity
C. uses aluminum as catalysts
D. is eco-friendly
E. is actually a type of Galvanic cell only
Choose the correct answer from the options given below:
- a
A, B, D, E only
- b✓
A, D, E only
- c
A, B, D only
- d
A, B, C only
A, D, E only
Strategy: Evaluate the characteristics of H₂-O₂ fuel cells: usage history, efficiency, catalyst types, environmental impact, and classification.
Statements Evaluation:
- A (Spa\ceship): True. Fuel cells provided water and power for Apollo missions. ✓
- B (Efficiency): False. Fuel cells have high efficiency (~70%), not just 40%. ✗
- C (Catalyst): False. Catalysts are typically Platinum or Palladium, not Aluminum. ✗
- D (Eco-friendly): True. Water is the only product. ✓
- E (Galvanic): True. They are galvanic cells where fuel is continuously supplied. ✓
Correct set: A, D, E.
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