Question

is known as
a) polarisation
b) back e.m.f. c) overvoltage
d) electrolysis
5. Which of the following factors decreases the overpotential ?
a) increase in thermionic work function b) smooth surface
c) increase in current density
d) increase in temperature
6. What is the condition under which a metal ion is deposited in preference to hydrogen
during electrolysis ?
a) Ematal, ior-> (0.0591 pH + OH,) b) Emetal, ion < (0.0591 pH + OH,)
c) Emctalion >(0.0591 pH+ 0,) d) Enetal, ion < (0.0591pH + O.,)
7. Coulometric method is based on extension of
a) Ostwald's law
b) Ohm's law
c) Graham's law
d) Faraday's law
8. In controlled cathode potential electrolysis, the third electrode used is
a) working electrode
b) reference electrode
c) counter electrode
d) auxillary electrode
9. A potentiostat is used to control_
a) voltage bfcurrent
c) resistance
d) wattage
Q.2 State True or False :
4. When a non-linear relationship is shown between potential and current, the phenomenon​

Answer 1

Answer:

can you explain what we have to do in 1st question