41. Overpotential refers to:
A. Extra voltage needed
B. Loss of current
C. Heat loss
D. Energy gain
Answer: A
42. Internal resistance is due to:
A. Electrolyte
B. Electrodes
C. Both
D. None
Answer: C
43. Electrochemical series is based on:
A. Atomic mass
B. Electrode potential
C. Density
D. Volume
Answer: B
44. Metal higher in series:
A. More reactive
B. Less reactive
C. Neutral
D. Stable
Answer: A
45. Cell reaction is:
A. Sum of half reactions
B. Single reaction
C. No reaction
D. Neutral reaction
Answer: A
46. Half-cell consists of:
A. Electrode + electrolyte
B. Wire only
C. Salt bridge
D. Battery
Answer: A
47. Potential difference drives:
A. Heat
B. Current
C. Mass
D. Light
Answer: B
48. Conductance is inverse of:
A. Resistance
B. Voltage
C. Current
D. Power
Answer: A
49. Unit of conductance:
A. Ohm
B. Siemens
C. Volt
D. Ampere
Answer: B
50. Kohlrausch’s law relates to:
A. Conductivity
B. Pressure
C. Temperature
D. Volume
Answer: A