[amp_mcq option1=”compactness” option2=”lower e.m.f.” option3=”small quantity of electrolyte used” option4=”higher internal resistance” correct=”option4″]
Electrolysis and storage of batteries
62. During the charging of a lead-acid cell
[amp_mcq option1=”Its voltage increases” option2=”It gives out energy” option3=”Its cathode becomes dark chocolate brown in colour” option4=”Specific gravity of H2SO4 decreases” correct=”option1″]
63. Chargmg of sulphated battery produces ____ heat.
[amp_mcq option1=”no” option2=”very little” option3=”less” option4=”more” correct=”option4″]
Detailed SolutionChargmg of sulphated battery produces ____ heat.
64. The active materials of a nickel-iron battery are
[amp_mcq option1=”nickel hydroxide” option2=”powdered iron and its oxide” option3=”21% solution of kOH” option4=”all of the above” correct=”option4″]
Detailed SolutionThe active materials of a nickel-iron battery are
65. Internal resistance of a cell is due to
[amp_mcq option1=”resistance of electrolyte” option2=”electrode resistance” option3=”surface contact resistance between electrode and electrolyte” option4=”all above” correct=”option4″]
66. Which of the following primary cells has the highest voltage ?
[amp_mcq option1=”Manganese-alkaline” option2=”Carbon-zinc” option3=”Lithium” option4=”Mercury” correct=”option3″]
Detailed SolutionWhich of the following primary cells has the highest voltage ?
67. Electrolyte used in an Edison cell is
[amp_mcq option1=”NaOH” option2=”KOH” option3=”HCl” option4=”HNO3″ correct=”option1″]
68. Short circuiting of a cell may be caused
[amp_mcq option1=”buckling of plates” option2=”faulty separators” option3=”lead particles forming circuit between positive and negative plates” option4=”excessive accumulation of sediment E. any one of above” correct=”option3″]
69. During the charging and discharging of a nickel-iron cell
[amp_mcq option1=”corrosive fumes are produced” option2=”water is neither formed nor absorbed” option3=”nickel hydroxide remains unsplit” option4=”its e.m.f. remains constant” correct=”option2″]
Detailed SolutionDuring the charging and discharging of a nickel-iron cell
70. The open circuit voltage of any storage cell depends wholly upon
[amp_mcq option1=”its chemical constituents” option2=”on the strength of its electrolyte” option3=”its temperature” option4=”all above” correct=”option4″]
Detailed SolutionThe open circuit voltage of any storage cell depends wholly upon