Question detail
What is the primary reason for using two different metals in a simple chemical cell?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical cells and fuel cells (chemistry only)
Question
- A. To increase the size of the cell
- B. To create a voltage difference
- C. To improve the conductivity
- D. To reduce the weight of the cell
Answer
To create a voltage difference
Explanation
Two different metals are used to create a voltage difference due to their differing reactivities, which drives the electrochemical reaction.
Common mistake
Misunderstanding Reactivity Order
Students often confuse the reactivity of metals, thinking that all metals react similarly in cells regardless of their position in the reactivity series.
To fix this, students should study the reactivity series and understand that more reactive metals will displace less reactive metals in reactions, affecting the voltage produced in cells.
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