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Batteries
48問 • 1年前
  • Nayan Kumar
    • 通報

    問題一覧

  • 1

    Those galvenic cell which cannot be recharge again and again are known as

    primary cell

  • 2

    Those galvanic cell which can be recharged again and again

    secondary cell

  • 3

    Emf of dry cell

    1.5V

  • 4

    Dry cell are also known as leclanche cell

    t

  • 5

    Which substance act as cathode in dry cell

    t

  • 6

    Which substance act as anode in dry cell

    t

  • 7

    Which substance act as electrolyte in dry cell

    t

  • 8

    Manganese gets reduced to form which compound in dry cell reaction

    t

  • 9

    Manganese gets reduced in dry cell reaction to

    +4 to +3

  • 10

    Manganese gets reduced in dry cell reaction

    t

  • 11

    Net reaction of a dry cell is irreversible so it can be recharge

    f

  • 12

    Zinc gets oxidized in dry cell reaction

    t

  • 13

    Which complex is formed by Zn²+ with ammonia (NH3)

    t

  • 14

    Pb acts as cathode in lead storage battery

    f

  • 15

    Grid of lead packed with PbO2 act as cathode in lead storage battery

    t

  • 16

    Which substance act as electrolyte in lead storage battery

    t

  • 17

    In lead storage battery density of solution gets decreases during discharging

    t

  • 18

    In lead storage battery recharging is done by applying EMF in opposite direction to reverse the direction

    t

  • 19

    Those device which convert energy release during combustion of a substance into electrical energy are known as

    fuel cell

  • 20

    Which fuel cell was used in Apollo space program

    t

  • 21

    Fuel cell can give constant emf because Qc can be kept constant by supplying gas at constant pressure

    t

  • 22

    During discharging reaction of lead storage battery lead sulphate (PbSO4) gets dissociated

    f

  • 23

    During discharging reaction of lead storage battery PbO2 converts to Pb²+

    t

  • 24

    During discharging reaction of lead storage battery Pb converts to Pb²+

    t

  • 25

    Dry cell is commonly used in our transistor and clocks

    t

  • 26

    Mercury cells suitable for low current devices like hearing AIDS watches etc

    t

  • 27

    Which substance act as anode in Mercury cell

    t

  • 28

    Which substance act as cathode in Mercury cell

    t

  • 29

    Which substance act as electrolyte in Mercury cell

    t

  • 30

    EMI produced by Mercury cell

    1.35V

  • 31

    A: cell potential of Mercury cell remains constant during its life R: overall cell reaction does not involve any ion

    1

  • 32

    Spongy lead acts as anode in lead storage battery

    t

  • 33

    When the lead storage cell discharges it act as voltaic cell

    t

  • 34

    Nickel cadmium cell is expensive than lead storage battery

    t

  • 35

    Anode in nickel cadmium cell

    cadmium

  • 36

    Nickel cadmium cell has more life than lead storage battery

    t

  • 37

    Cathode in nickel cadmium cell

    metal grid containing NiO2

  • 38

    Electrolyte in nickel cadmium cell

    KOH solution

  • 39

    Fuel cells are pollution free and have high efficiency

    t

  • 40

    Efficiency of fuel cell

    70%

  • 41

    Efficiency of thermal power plant

    40%

  • 42

    Electrolyte used in hydrogen oxygen fuel cell

    NaOH

  • 43

    Catalysts like finely divided platinum or palladium metal are incorporated into the electrodes for increasing the rate of electrode reactions

    t

  • 44

    The water vapours produced during the reaction were condensed and added to the drinking water supply for the astronauts.

    t

  • 45

    Incorrect statement about dry cell is

    Zn container act as cathode

  • 46

    Incorrect statement about Mercury cell

    paste of KOH and ZnO act as anode

  • 47

    A: energy conversion from chemical energy to electrical energy is more efficient by galvanic cell in compared to thermal power plants R: galvanic cell directly convert chemical energy into electrical energy

    1

  • 48

    It is now possible to make such cell in which reactants are fed continuously to the electrodes and products are removed continuously

    t

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    問題一覧

  • 1

    Those galvenic cell which cannot be recharge again and again are known as

    primary cell

  • 2

    Those galvanic cell which can be recharged again and again

    secondary cell

  • 3

    Emf of dry cell

    1.5V

  • 4

    Dry cell are also known as leclanche cell

    t

  • 5

    Which substance act as cathode in dry cell

    t

  • 6

    Which substance act as anode in dry cell

    t

  • 7

    Which substance act as electrolyte in dry cell

    t

  • 8

    Manganese gets reduced to form which compound in dry cell reaction

    t

  • 9

    Manganese gets reduced in dry cell reaction to

    +4 to +3

  • 10

    Manganese gets reduced in dry cell reaction

    t

  • 11

    Net reaction of a dry cell is irreversible so it can be recharge

    f

  • 12

    Zinc gets oxidized in dry cell reaction

    t

  • 13

    Which complex is formed by Zn²+ with ammonia (NH3)

    t

  • 14

    Pb acts as cathode in lead storage battery

    f

  • 15

    Grid of lead packed with PbO2 act as cathode in lead storage battery

    t

  • 16

    Which substance act as electrolyte in lead storage battery

    t

  • 17

    In lead storage battery density of solution gets decreases during discharging

    t

  • 18

    In lead storage battery recharging is done by applying EMF in opposite direction to reverse the direction

    t

  • 19

    Those device which convert energy release during combustion of a substance into electrical energy are known as

    fuel cell

  • 20

    Which fuel cell was used in Apollo space program

    t

  • 21

    Fuel cell can give constant emf because Qc can be kept constant by supplying gas at constant pressure

    t

  • 22

    During discharging reaction of lead storage battery lead sulphate (PbSO4) gets dissociated

    f

  • 23

    During discharging reaction of lead storage battery PbO2 converts to Pb²+

    t

  • 24

    During discharging reaction of lead storage battery Pb converts to Pb²+

    t

  • 25

    Dry cell is commonly used in our transistor and clocks

    t

  • 26

    Mercury cells suitable for low current devices like hearing AIDS watches etc

    t

  • 27

    Which substance act as anode in Mercury cell

    t

  • 28

    Which substance act as cathode in Mercury cell

    t

  • 29

    Which substance act as electrolyte in Mercury cell

    t

  • 30

    EMI produced by Mercury cell

    1.35V

  • 31

    A: cell potential of Mercury cell remains constant during its life R: overall cell reaction does not involve any ion

    1

  • 32

    Spongy lead acts as anode in lead storage battery

    t

  • 33

    When the lead storage cell discharges it act as voltaic cell

    t

  • 34

    Nickel cadmium cell is expensive than lead storage battery

    t

  • 35

    Anode in nickel cadmium cell

    cadmium

  • 36

    Nickel cadmium cell has more life than lead storage battery

    t

  • 37

    Cathode in nickel cadmium cell

    metal grid containing NiO2

  • 38

    Electrolyte in nickel cadmium cell

    KOH solution

  • 39

    Fuel cells are pollution free and have high efficiency

    t

  • 40

    Efficiency of fuel cell

    70%

  • 41

    Efficiency of thermal power plant

    40%

  • 42

    Electrolyte used in hydrogen oxygen fuel cell

    NaOH

  • 43

    Catalysts like finely divided platinum or palladium metal are incorporated into the electrodes for increasing the rate of electrode reactions

    t

  • 44

    The water vapours produced during the reaction were condensed and added to the drinking water supply for the astronauts.

    t

  • 45

    Incorrect statement about dry cell is

    Zn container act as cathode

  • 46

    Incorrect statement about Mercury cell

    paste of KOH and ZnO act as anode

  • 47

    A: energy conversion from chemical energy to electrical energy is more efficient by galvanic cell in compared to thermal power plants R: galvanic cell directly convert chemical energy into electrical energy

    1

  • 48

    It is now possible to make such cell in which reactants are fed continuously to the electrodes and products are removed continuously

    t