Related Questions

During the charging and discharging of a nickel-iron cell
A corrosive fumes are produced
B water is neither formed nor absorbed
C nickel hydroxide remains unsplit
D its e.m.f. remains constant
The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
A Lewis-Randall rule
B Statement of Vant-Hoff equation
C Le-Chatelier's principle
D None of these
In constant voltage charging method, the charging current from discharged to fully charged condition
A decreases
B increases
C remains constant
D none of the above
Under normal charging rate, the charging current should be
A 10% of capacity
B 20% of capacity
C 30% of capacity
D 40% of capacity
Those substances which have so far not been resolved by any means into other substances of simpler form are called
A Atoms
B Compounds
C Elements
D Molecules
During the charging of a lead-acid cell
A Its voltage increases
B It gives out energy
C Its cathode becomes dark chocolate brown in colour
D Specific gravity of H2SO4 decreases
At Uttara High school each student studies exactly one foreign languages. Three-fifth of the students take Spanish and one-fourth of the remaining students take take German. If all of the others take French, What percent of the students take French?
A 10
B 30
C 20
D 25
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in
A Light intensity
B Current
C Flux density
D Voltage
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
A 50 units
B 60 units
C 70 units
D 80 units
The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
A Equivalent weight
B (Equivalent weight)2
C Molecular weight
D (Molecular weight)2

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