Electrolysis and Storage of Batteries

A. 20 to 30%
B. 40 to 50%
C. 60 to 70%
D. 90 to 95%

A. dull
B. reddish
C. bright
D. milky

A. silver oxide
B. lead oxide
C. lead
D. zinc powder

A. 1 V
B. 1.2 V
C. 1.7 V
D. 2.1 V

A. 25 to 35%
B. 40 to 60%
C. 70 to 80%
D. 90 to 95%

A. maintain proper electrolyte level
B. increase its reserve capacity
C. prevent sulphation
D. keep it fresh and fully charged

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. compactness
B. lower e.m.f.
C. small quantity of electrolyte used
D. higher internal resistance

A. one part H2O, three parts H2SO4
B. two parts H2O, two parts H2SO4
C. three parts H2O, one part H2SO4
D. all H2S04

A. both anode and cathode become PbS04
B. specific gravity of H2SO4 decreases
C. voltage of the cell decreases
D. the cell absorbs energy