When an active metal like Al comes in contact with less reactive element like Cu then it produces
Correct answer: C. galvanic cell
- A. dry cell
- B. electrolytic cell
- C. galvanic cell
- D. both and and b
Explanation
Galvanic cells, also known as voltaic cells, generate electrical energy through spontaneous redox reactions. When aluminum comes in contact with copper, aluminum tends to oxidize (loses electrons) more readily than copper. This creates a potential difference, and if a conductive path is provided, electrons will flow from aluminum to copper, creating an electrical current. This process is the basis of a galvanic cell.At the aluminum electrode (oxidation):2Al (s)→2Al3+ (aq) +6e-At the copper electrode (reduction):Cu2+ (aq) +2e-→ Cu (s)Combining these two half-reactions gives the overall reaction:2Al (s)+3Cu2+ (aq)→2Al3+ (aq)+3Cu (s)
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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