When an active metal like Al comes in contact with less active element like Cu then it produces__________________?
Correct answer: B. galvanic cell
- A. dry cell
- B. galvanic cell
- C. electrolytic cell
- D. A and B
Explanation
When aluminium and copper are connected in the presence of an electrolyte, aluminium is oxidised and copper acts as the site of reduction, producing a spontaneous galvanic cell. The likely alternative is an electrolytic cell, but electrolysis requires an external electrical supply to drive a non-spontaneous reaction.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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