Electrochemical Cells is one of 9 topics in the Grade 12 Technical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What type of reaction powers a galvanic cell?
A spontaneous redox reaction
A non-spontaneous reaction requiring external power
A combustion reaction
An addition reaction
Answer: A spontaneous redox reaction — A galvanic cell converts chemical energy into electrical energy through a spontaneous redox reaction.
Easy
2. In a galvanic cell, at which electrode does oxidation occur?
The anode
The cathode
Neither electrode
Both electrodes equally
Answer: The anode — Oxidation (loss of electrons) occurs at the anode in a galvanic cell.
Medium
3. Name the component of a galvanic cell that maintains electrical neutrality by allowing ion flow between the two half-cells without the solutions physically mixing.
Answer: salt bridge — The salt bridge maintains electrical neutrality within each half-cell by allowing ion flow between them without the solutions physically mixing.
