Which one of the following statements is the most accurate?
A - VCE - SSCE Chemistry - Question 1 - 2018 - Paper 1
Question 1
Which one of the following statements is the most accurate?
A. All fuel cells are galvanic cells.
B. All galvanic cells are primary cells.
C. All secondary cells hav... show full transcript
Worked Solution & Example Answer:Which one of the following statements is the most accurate?
A - VCE - SSCE Chemistry - Question 1 - 2018 - Paper 1
Step 1
A. All fuel cells are galvanic cells.
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Answer
This statement is inaccurate because while all fuel cells produce electrical energy from chemical reactions like galvanic cells, not all fuel cells are classified strictly as galvanic cells. They have distinct mechanisms and applications.
Step 2
B. All galvanic cells are primary cells.
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This statement is also incorrect. Although many galvanic cells are primary (non-rechargeable), there are also secondary (rechargeable) cells that utilize galvanic principles.
Step 3
C. All secondary cells have porous electrodes.
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This statement is not universally true. While many secondary cells employ porous electrodes to facilitate the transfer of ions, there are variations in design and functionality that do not necessitate porous electrodes.
Step 4
D. All fuel cells are more efficient than all secondary cells.
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This statement is the most accurate. Generally, fuel cells are designed to have higher efficiencies compared to traditional secondary cells, making this the best choice among the options provided.
