Question is ⇒ Pickling is, Options are ⇒ (A) protection of surface from rusting., (B) a layer coating for preventing surface deterioration., (C) removal of scale, grease etc. from the surface., (D) none of the above., (E) , Leave your comments or Download question paper.

Question is ⇒ Pickling is, Options are ⇒ (A) protection of surface from rusting., (B) a layer coating for preventing surface deterioration., (C) removal of scale, grease etc. from the surface., (D) none of the above., (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Pickling is
A.	protection of surface from rusting. [Wrong Answer]
B.	a layer coating for preventing surface deterioration. [Wrong Answer]
C.	removal of scale, grease etc. from the surface. [Correct Answer]
D.	none of the above. [Wrong Answer]
View Answer 13 -2 Explanation:- Answer : C 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 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.

⇒ Addition of which of the following substances in electrolyte promotes smooth deposition?
Albumen.
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quantity of electricity
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⇒ Capacity of a dry cell is
more when it supplies current continuously.
more when it supplies current intermittently.
not affected by the type of discharge.
none of the above.

⇒ Five cells are connected in series in a row and then four such rows are connected in parallel to feed the current to a resistive load of 1.25 ω. Each cell has an emf of 1.5 V with an internal resistance of 0.2 ω. The current through the load will be
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⇒ 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.

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Voltage increases
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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).

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anode and cathode are kept closer.
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⇒ The energy capacity of a storage battery is rated in
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efficiency.
current capacity.
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⇒ In a lead acid battery, separators are provided to
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⇒ The relative density of the electrolyte of acid accumulator should not be allowed to fall below
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⇒ During electrodeposition. the amounts of different substances liberated by same quantity of electricity are proportional to
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atomic numbers

⇒ 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.
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none of the above

⇒ The current capacity of the charged secondary cell does not depend on
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⇒ The emf of a lead battery
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slightly increases with the increase in temperature.
decreases with the increase in temperature.
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⇒ Charging of a sulphated battery at high rate causes
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boiling of electrolyte owing to gassing.
damage to separators, cell caps, covers and battery case due to excessive temperature.
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⇒ Which of the following is not the name of a secondary cell ?
Acid cell
Alkali cell
Fuel cell
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⇒ First electrochemical cell was designed by
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Lechlanche
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hot alkaline solutions.
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any of the above.

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Relative density of electrolyte decreases
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