Answer: electrochemical process.
- A simple reduction only
- B electrochemical process
- C sublimation change
- D endothermic melting
Correct answer: B. electrochemical process
Explanation: Rusting sets up tiny galvanic cells on the iron surface, making corrosion an electrochemical process.
In a Daniell cell, electrons flow externally from the zinc anode (oxidation) through the voltmeter to the copper cathode (reduction), while the salt bridge completes the circuit.
Concept context
Explore the link between chemical reactions and electricity. Covers galvanic cells, electrolysis, standard electrode potentials, the Nernst equation, and real-world applications like batteries and corrosion.