Electrodes-Multiple Choice Questions Quiz

Question 1: What is the primary function of an electrode in an electrochemical cell?

(a) To provide electrical insulation
(b) To regulate temperature
(c) To transfer charge between the electrolyte and external circuit
(d) To release gases

Question 2: In a galvanic cell, where does oxidation occur?

(a) At the anode
(b) At the cathode
(c) In the electrolyte
(d) In the salt bridge

Question 3: Which type of electrode is used to measure the pH of a solution?

(a) Silver electrode
(b) Platinum electrode
(c) Glass electrode
(d) Zinc electrode

Question 4: What is the purpose of a reference electrode in electrochemistry?

(a) To conduct electricity
(b) To provide a stable and known electrode potential
(c) To generate ions
(d) To initiate redox reactions

Question 5: Which electrode is typically made of a material that is chemically inert and resistant to corrosion?

(a) Active electrode
(b) Inert electrode
(c) Sacrificial electrode
(d) Nonmetallic electrode

Question 6: What is the role of a salt bridge in an electrochemical cell?

(a) To conduct electricity
(b) To prevent ion migration
(c) To maintain electrical neutrality in half-cells
(d) To regulate temperature

Question 7: Which type of electrode is used as the standard hydrogen electrode (SHE)?

(a) Platinum electrode
(b) Gold electrode
(c) Mercury electrode
(d) Silver electrode

Question 8: What is the purpose of a counter electrode in an electrolytic cell?

(a) To count the number of electrons transferred
(b) To initiate the electrochemical reaction
(c) To provide a site for the reduction reaction
(d) To provide a site for the oxidation reaction

Question 9: Which type of electrode is involved in the half-reaction that takes place at the cathode of an electrochemical cell?

(a) Anode electrode
(b) Cathode electrode
(c) Working electrode
(d) Counter electrode

Question 10: What is the purpose of an auxiliary electrode in an electrochemical cell?

(a) To assist the reference electrode
(b) To balance the cell potential
(c) To provide additional stability
(d) To support the counter electrode's function

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Total score: /10

Answer key:

Question 1: c

Question 2: a

Question 3: c

Question 4: b

Question 5: b

Question 6: c

Question 7: a

Question 8: c

Question 9: b

Question 10: d