21. The standard hydrogen electrode has potential:
A. 1 V
B. 0 V
C. -1 V
D. 2 V
Answer: B
22. Corrosion is:
A. Reduction process
B. Oxidation process
C. Neutralization
D. Hydrolysis
Answer: B
23. Rusting of iron involves:
A. Only oxidation
B. Only reduction
C. Both oxidation and reduction
D. No reaction
Answer: C
24. The electrolyte conducts electricity by:
A. Electrons
B. Ions
C. Protons
D. Neutrons
Answer: B
25. In electrolysis, cations move towards:
A. Anode
B. Cathode
C. Salt bridge
D. Wire
Answer: B
26. Anions move towards:
A. Cathode
B. Anode
C. Battery
D. Electrolyte
Answer: B
27. Faraday is unit of:
A. Charge
B. Current
C. Voltage
D. Resistance
Answer: A
28. One Faraday equals:
A. 96500 C
B. 1000 C
C. 50000 C
D. 1 C
Answer: A
29. The Nernst equation is used to calculate:
A. Resistance
B. Cell potential
C. Current
D. Temperature
Answer: B
30. Standard temperature is:
A. 0°C
B. 25°C
C. 50°C
D. 100°C
Answer: B