When we react an active metal like Al with less active element like Cu, it will form?
Correct answer: B. Galvanic cell
- A. Dry cell
- B. Galvanic cell
- C. Electrolytic cell
- D. A and B
Explanation
The correct option is B. When an active metal like Al reacts with a less active element like Cu, it will form a galvanic cell. A galvanic cell is a type of electrochemical cell that produces an electric current by the spontaneous reaction of two half-cells. In the case of Al and Cu, the active metal Al will be oxidized, while the less active metal Cu will be reduced. The oxidation of Al will produce electrons, which will flow through the external circuit to the reduction of Cu. The overall reaction is as follows: Al(s) + Cu2+(aq) → Al3+(aq)+ Cu(s) The electrons that flow through the external circuit will create a voltage, which can be used to power devices. Galvanic cells are used in a variety of applications, including batteries, flashlights, and calculators.
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