Question is ⇒ Through an electrolyte an electric current is due to drift of, Options are ⇒ (A) Free electrons, (B) Positive and negative ions, (C) Free electrons and holes, (D) Protons, (E) , Leave your comments or Download question paper.

Question is ⇒ Through an electrolyte an electric current is due to drift of, Options are ⇒ (A) Free electrons, (B) Positive and negative ions, (C) Free electrons and holes, (D) Protons, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Through an electrolyte an electric current is due to drift of
A.	Free electrons [Wrong Answer]
B.	Positive and negative ions [Correct Answer]
C.	Free electrons and holes [Wrong Answer]
D.	Protons [Wrong Answer]
View Answer 9 -3 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ The emf of primary cell depends upon the
physical dimensions of a cell.
nature of electrolyte.
nature of electrode.
both (b) and (c).

⇒ If the specific gravity of the electrolyte in a lead acid cell increases beyond 1.23 there will be
loss of life.
loss of capacity.
increase in internal resistance.
corrosion of the grids of the plate.

⇒ The capacity of a lead acid battery does not depend upon
charge rate.
discharge rate.
temperature.
density of electrolyte & quantity of active material.

⇒ Battery charging equipment should be installed
in well ventilated, clean and dry place.
as near as practical to the battery under charge.
both (a) and (b).
wherever convenient.

⇒ What causes lower efficiency of alkali cell as compared to the acid cell ?
Lower emf
Small amount of electrolyte
Longer life
Higher internal resistance

⇒ The arrangement of 12 cells, each of internal resistance 1.5 ω, to give maximum current in external load resistance of 2 ω will be
all 12 cells in series.
all 12 cells in parallel.
4 cells in series with 3 rows in parallel.
3 cells in series with 4 rows in parallel.

⇒ Cells are connected in parallel in order to increase the
life of the cells.
efficiency.
current capacity.
voltage rating.

⇒ In a lead acid battery, the level of the electrolyte should be
equal to that of the plates.
below the level of plates.
above the level of plates.
none of the above.

⇒ A floating battery is one
which is charged and discharged simultaneously.
in which battery voltage is equal to charger voltage.
which supplies current intermittently and also during idle period gets charged.
none of the above.

⇒ During discharging of lead acid cells, the terminal voltage decreases with the decrease in
temperature.
discharge rate.
state of charge.
none of these.

⇒ Which of the following tests is performed for ascertaining whether the battery plates are defective or not?
Specific gravity test.
High discharge test.
Cadmium test.
None of the above.

⇒ In comparison to constant current charging method, the constant voltage charging method of charging a lead acid battery has the advantage(s) of
increasing capacity of the battery.
reducing charging time.
avoiding of excessive gassing.
both (b) and (c).

⇒ Overcharging of a lead acid battery would cause
excessive gassing.
loss of active material.
increase in temperature resulting in buckling of plates.
all of the above.

⇒ The amount of ions liberated by 96500 C of charge passed through the electrolyte is called ?
Electrochemical equivalent
Chemical equivalent
Gram equivalent
None of these

⇒ Which of the following statements is correct about lead acid batteries ?
It delivers current as soon as its components are put together.
Density of electrolyte increases while delivering current
lt does not deliver current on putting its components together until it is supplied electrical energy from an external source
It has lead as positive plates.

⇒ The electric cell is a device to obtain
Electrons
Electric charge
Electric energy from chemical energy
Electric force

⇒ Sulphated cells are indicated by the
low specific gravity.
low voltage on discharge.
low capacity.
all of the above.

⇒ The energy capacity of a storage battery is rated in
kWh.
kW.
ampere hours.
joules.

⇒ Through an electrolyte an electric current is due to drift of
Free electrons
Positive and negative ions
Free electrons and holes
Protons

⇒ The relative density of the electrolyte of acid accumulator should not be allowed to fall below
1.80
1.50
1.28
1.18

⇒ Pickling is
protection of surface from rusting.
a layer coating for preventing surface deterioration.
removal of scale, grease etc. from the surface.
none of the above.

⇒ First electrochemical cell was designed by
Galvani
Faraday
Lechlanche
None of these

⇒ Standard cell
will have precise and accurate constant voltage when current drawn from it is few microamperes only.
will have precise and accurate constant voltage when few milliamperes are drawn from it.
will continue to have constant voltage irrespective of loading conditions.
can supply voltages up to 10 V.

⇒ Charging of a sulphated battery at high rate causes
warping of plates.
boiling of electrolyte owing to gassing.
damage to separators, cell caps, covers and battery case due to excessive temperature.
all of the above.

⇒ A battery is connected to a resistance causing a current of 0.5 A in the circuit. The current drops to 0.4 A when an additional resistance of 5 ω is connected in series. The current will drop to 0.2 A when the resistance is further increased by
10 ω
15 ω
25 ω
40 ω

⇒ During electrodeposition. the amounts of different substances liberated by same quantity of electricity are proportional to
atomic weights.
valency.
chemical equivalents.
atomic numbers

⇒ Common impurity in a battery electrolyte is
dust particles.
iron.
lead crystals.
sodium chloride.

⇒ In a battery, cover is placed over the elements and sealed at the top of the battery container. This is done in order to
exclude dirt and foreign matter from the electrolyte.
reduce evaporation of water from electrolyte.
both (a) and (b).
none of the above

⇒ During charging and discharging of an Edison cell
electrolyte does not take part in chemical reaction.
emf remains the same.
corrosive fumes are produced.
nickel hydroxide remains unsplit.

⇒ In which of the following cells polarisation is the major defect ?
Voltanic cell
Lechlanche cell
Daniel cell
None of these