Which one of the following is the most correct statement about fuel cells and secondary cells?
A - VCE - SSCE Chemistry - Question 8 - 2020 - Paper 1
Question 8
Which one of the following is the most correct statement about fuel cells and secondary cells?
A. Fuel cells can be recharged like secondary cells.
B. Fuel cells pro... show full transcript
Worked Solution & Example Answer:Which one of the following is the most correct statement about fuel cells and secondary cells?
A - VCE - SSCE Chemistry - Question 8 - 2020 - Paper 1
Step 1
A. Fuel cells can be recharged like secondary cells.
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Answer
This statement is incorrect. Fuel cells continuously produce energy as long as they are supplied with fuel, while secondary cells (batteries) can be recharged after discharging.
Step 2
B. Fuel cells produce thermal energy, whereas secondary cells do not produce thermal energy.
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Answer
This statement is misleading. While fuel cells may produce some thermal energy, it is not their primary function like batteries, which store and release electrical energy.
Step 3
C. The anode in a fuel cell is positive, whereas the anode in a secondary cell is negative.
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Answer
This statement is incorrect. In a fuel cell, the anode is negative, and in a secondary cell during discharge, the anode is negative as well.
Step 4
D. Fuel cells deliver a constant voltage during their operation, whereas secondary cells reduce in voltage as they discharge.
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Answer
This statement is the most accurate. Fuel cells are designed to produce a steady voltage as long as there is an adequate supply of fuel, while secondary cells typically show a decrease in voltage over time as they discharge.
