Category: Electrolysis and Storage of Batteries

A. there is a rise in voltage
B. energy is absorbed by the cell
C. specific gravity of H2SO4 is increased
D. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
E. all of the above

A. manometer
B. a mechanical gauge
C. hydrometer
D. psychrometer

A. using vent plug to permit gas formed during discharge
B. increasing the plate area
C. putting plates very close together
D. all above methods

A. dark grey
B. brown
C. dark brown
D. none of above

A. Lead-acid cell, Edison cell, Nickel cadmium cell
B. Lead-acid cell, Nickel-cadmium cell, Edison cell
C. Edison cell, Nickel-cadmium cell, lead-acid cell
D. Nickel-cadmium cell, Edison cell, lead-acid cell

A. 6 parts of acid to 4 parts of water
B. 4 parts of acid to 4 parts of water
C. 4 parts of acid to 6 parts of water
D. 4 parts of acid to 8 parts of water

A. glass
B. plastic
C. wood
D. all above

A. adding distilled water
B. adding so-called battery restorer
C. a dose of H2SO4
D. none of the above

A. they have same e.m.f.
B. they have same make
C. they have same ampere-hour capacity
D. they have identical internal resistance

A. capacity of the cell is reduced
B. life of the cell is reduced
C. open plates are converted to lead sulphate
D. all above