Electrochemistry and Batteries MCQs

1. What is the device called that converts chemical energy into electrical energy?
(A) Capacitor
(B) Transformer
(C) Battery
(D) Generator

2. In an electrochemical cell, oxidation occurs at the:
(A) Cathode
(B) Anode
(C) Salt bridge
(D) Electrolyte

3. The flow of electrons in an electrochemical cell is from:
(A) Cathode to anode
(B) Salt bridge to electrodes
(C) Anode to cathode
(D) Electrolyte to salt bridge

4. Which of the following is an example of a primary cell?
(A) Lead-acid battery
(B) Nickel-cadmium battery
(C) Mercury cell
(D) Fuel cell

5. What is the function of a salt bridge in a galvanic cell?
(A) To generate electricity
(B) To prevent oxidation
(C) To allow the flow of electrons
(D) To maintain electrical neutrality

6. In which type of electrochemical cell is electrical energy used to drive a non-spontaneous reaction?
(A) Galvanic cell
(B) Voltaic cell
(C) Electrolytic cell
(D) Dry cell

7. The standard electrode potential of a hydrogen electrode is:
(A) +1.0 V
(B) -1.0 V
(C) 0.0 V
(D) +0.5 V

8. Which of the following is used as the electrolyte in a lead-acid battery?
(A) HCl
(B) NaCl
(C) KOH
(D) H₂SO₄

9. A rechargeable battery is also called a:
(A) Primary cell
(B) Dry cell
(C) Secondary cell
(D) Fuel cell

10. What occurs at the cathode in an electrolytic cell?
(A) Oxidation
(B) Electron loss
(C) Reduction
(D) Gas release