71. One mole of electrons carries:
A. 96500 C
B. 1000 C
C. 500 C
D. 1 C
Answer: A
72. Electrochemical equivalent depends on:
A. Temperature
B. Equivalent weight
C. Pressure
D. Volume
Answer: B
73. Cell potential depends on:
A. Concentration
B. Temperature
C. Nature of electrodes
D. All
Answer: D
74. A spontaneous reaction has:
A. Negative EMF
B. Positive EMF
C. Zero EMF
D. Infinite EMF
Answer: B
75. Non-spontaneous reaction has:
A. Positive EMF
B. Negative EMF
C. Zero EMF
D. Constant EMF
Answer: B
76. Free energy change is related to EMF by:
A. ΔG = -nFE
B. ΔG = nFE
C. ΔG = FE
D. ΔG = n/E
Answer: A
77. If ΔG is negative, reaction is:
A. Non-spontaneous
B. Spontaneous
C. Neutral
D. Slow
Answer: B
78. Increase in concentration increases:
A. EMF
B. Resistance
C. Pressure
D. Volume
Answer: A
79. Salt bridge contains:
A. Strong electrolyte
B. Weak electrolyte
C. Metal
D. Gas
Answer: A
80. Standard EMF is denoted as:
A. E°
B. I
C. R
D. V
Answer: A