The Galvanic cell quiz3

 (77) The lead-acid battery

(76) What happens during discharge reaction in the lead-acid battery?

Pb_(s)+PbO_2(s) +2H₂SO_4(aq) >>>  2PbS0_4(s)+2H₂O_(l)

(a) Both Pb and Pb⁴⁺  undergo oxidation

 (b) Both Pb and Pb⁴⁺  undergo reduction 

(C) Pb is oxidized and Pb⁴⁺ is reduced...

(d) Neither the Pb nor the Pb⁴⁺ is oxidized nor reduced

(75) In lead-acid battery, the electrolytic solution is

(a) 20% H₂SO₄.                (b) 20% HCI  

(c) 20% HNO₃                  (d) 20% C₂H₂O₄

(74) The battery used in cars is -------

(73) The secondary cells are ………..  cells.

(71) Which of the following statements is not correct about fuel cell ?

(72) Mercury cell and fuel cell are similar in the

(90) The reaction that occurs during the corrosion of iron is

(a) Fe³⁺_(s) + 3e^- >>> Fe^o_(s)

(b) Fe^o_(s)   >>> Fe²⁺_(aq) +2e^-.

(c) Fe²⁺_(s) + 2e^-  >>> Fe^o_(s)

(d) Fe³⁺_(s) + e^-  >>>  Fe²⁺_(s)

(89) The isolator in lithium ion battery ------------

(88) Lithium doesn't act as ---------- agent in any chemical reaction, because its --------

potential is the least compared to the other elements.

(87) The electrolyte in Li-ion battery is ---------

(86) The standard reduction potential of Li³⁺ ion is less than the reduction potential of

(82) The cathode in lead accumulator formed from a network of lead filled with --------

(83) On conducting car battery by an electric source, its electromotive force is 12.6 V

(84) The alkaline lithium-ion battery.....

(85) The lithium-ion battery is characterized by all of the following, except --------

(101) The coating applied must be chemically ---------  to the environment.

(100) Zn ---------- than  Fe

(99)  …….  is used for producing a coating of low melting metal such as Zn on steel.

(98)----------- is the process of covering Fe or steel with zinc coating.

(97) The coating of Zn and Mg on steel is ---------------- because their reduction potentials are lower

(96) The metal which doesn't act as a sacrificial anode is .... 

(95) The more active metal used in an anodic protection method is known as

(94) Iron corrodes faster in seawater than in pure water, because  ---------

(93) Corrosion of iron can be prevented by attaching with a piece of ---------------

(92) Which of the following should be used to anodically protect iron ?

(80) To recharge a car battery in which the acid density is 1.1 g/cm³, the battery is connected to …….

(79) The car battery needs to be recharged when ----------------

(78) The total potential of the lead-acid battery is ---- volts

(81) The anode in lead accumulator formed from a network of lead filled with --------