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Chemical Technician (Analytical Chemistry) > pH Meters and Ion Analysers > Flashcards

pH Meters and Ion Analysers Flashcards

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1
Q
  1. Which of the following is the formula for pH calculation?
    a) log10[H+]
    b) -log10[H+]
    c) log2[H+]
    d) -log2[H+]
A

b) -log10[H+]

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2
Q
  1. Pure water is known to be which of the following?
    a) Weak electrolyte
    b) Strong electrolyte
    c) Neither weak nor strong
    d) Not an electrolyte
A

a) Weak electrolyte

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3
Q
  1. Which of the following is the value of hydrogen ion
    concentration of pure water?
    a) 1×107 moles/litre
    b) 1×105 moles/litre
    c) 1×106 moles/litre
    d) 1×108 moles/litre
A

a) 1×107 moles/litre

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4
Q
  1. Which of the following is the value of hydroxyl ion
    concentration of pure water?
    a) 1×107 moles/litre
    b) 1×105 moles/litre
    c) 1×106 moles/litre
    d) 1×108 moles/litre
A

a) 1×107 moles/litre

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5
Q
  1. Which of the following is the relation between hydrogen
    and hydroxyl ion concentration of pure water?
    a) Value of hydrogen ion concentration is greater
    b) Value of hydroxyl ion concentration is greater
    c) They are both always the same
    d) The concentrations keep changing
A

c) They are both always the same

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6
Q
  1. Which of the following is the relation between the
    concentration of hydrogen and hydroxyl ions in an acidic
    solution?
    a) Value of hydrogen ion concentration is greater
    b) Value of hydroxyl ion concentration is greater
    c) They are both always the same
    d) The concentrations keep changing
A

a) Value of hydrogen ion concentration is greater

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6
Q
  1. The Nernst equation is given by which of the following
    statements?
    a) E=Eo + 2.303 RT/F log CH
    b) E=Eo – 2.303 RT/F log CH
    c) E=Eo + 2.303 RT×F log CH
    d) E=Eo – 2.303 RT×F log CH
A

a) E=Eo + 2.303 RT/F log CH

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7
Q
  1. Which of the following is the relation between the
    concentration of hydrogen and hydroxyl ions in a basic
    solution?
    a) Value of hydrogen ion concentration is greater
    b) Value of hydroxyl ion concentration is greater
    c) They are both always the same
    d) The concentrations keep changing
A

b) Value of hydroxyl ion concentration is greater

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8
Q
  1. Why is Standard hydrogen electrode called as the
    primary reference electrode?
    a) It has a known output potential
    b) It has a constant output potential
    c) Its output potential is independent of the composition
    of the solution
    d) Its output potential is zero volts
A

d) Its output potential is zero volts

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9
Q
  1. The measurement of hydrogen ion concentration can be
    made by measuring the potential developed in an
    electrochemical cell.
    a) True
    b) False
A

a) True

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10
Q
  1. Slope factor is independent of temperature.
    a) True
    b) False
A

b) False

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11
Q
  1. Which of the following is not the characteristic of a
    reference electrode?
    a) It must have a known output potential
    b) It must have a constant output potential
    c) Its output potential is dependent on the composition of the solution
    d) It is employed in conjunction with the indicator or
    working electrode
A

c) Its output potential is dependent on the composition of the solution

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12
Q
  1. Which of the following is the simple and most
    convenient hydrogen electrode?
    a) Pascal Hydrogen electrode
    b) Bourne Hydrogen electrode
    c) Hilderbant Hydrogen electrode
    d) West Hydrogen electrode
A

c) Hilderbant Hydrogen electrode

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13
Q
  1. Hydrogen electrode which is the reference electrode
    can be used as which of the following?
    a) Anode only
    b) Cathode only
    c) Anode or Cathode
    d) Salt bridge
A

c) Anode or Cathode

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14
Q
  1. Which of the following is not the disadvantage of
    hydrogen electrode?
    a) Platinum can be easily poisoned
    b) Presence of oxidising agents alters the potential
    c) It gives a salt error
    d) H2 gas at 1 atmospheric pressure is difficult to set up
    and transport
A

c) It gives a salt error

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15
Q
  1. In Hydrogen electrode, the electrode is placed in a
    solution of ____ M Hcl. Fill in the blank.
    a) 0.5
    b) 1
    c) 2
    d) 3
A

b) 1

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16
Q
  1. If hydrogen electrode acts as cathode, hydrogen is
    reduced.
    a) True
    b) False
A

a) True

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17
Q
  1. The composition of glass membrane in glass electrode
    cannot have which of the following?
    a) Sodium silicate
    b) Calcium silicate
    c) Lithium silicate
    d) Barium silicate
A

d) Barium silicate

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18
Q
  1. Which of the following is the purpose of added
    membranes in the glass membrane of the glass electrode?
    a) They act as tightners
    b) They act as filters
    c) They act as conditioners
    d) They act as collectors
A

a) They act as tightners

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19
Q
  1. Which of the following cannot form the inner
    reference electrode in glass electrodes?
    a) Silver electrode
    b) Copper electrode
    c) Calomel electrode
    d) Silver chloride electrode
A

b) Copper electrode

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20
Q
  1. The pH response of glass electrode is limited entirely
    to the area of the special glass membrane bulb.
    a) True
    b) False
A

a) True

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21
Q
  1. Which of the following is not the advantage of glass
    electrodes?
    a) It gives accurate results for high as well as low pH values
    b) It is simple to operate
    c) It has no salt error
    d) Modern electrodes can withstand severe treatment
A

a) It gives accurate results for high as well as low pH values

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22
Q
  1. Which of the following is not the disadvantage of glass
    electrodes?
    a) Poor readings are obtained in buffered or unbuffered solutions
    b) The electrode must be washed thoroughly with distilled water to obtain proper results
    c) Materials suspended on glass should be wiped out
    neatly to obtain proper results
    d) It is affected by oxidation reduction potentials in the
    solution
A

d) It is affected by oxidation reduction potentials in the
solution

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23
Q
  1. Which of the following cannot be used as secondary
    reference electrode?
    a) Calomel electrode
    b) Silver-silver chloride electrode
    c) Mercury-mercury sulphate electrode
    d) Glass electrode
A

d) Glass electrode

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24
Q
  1. Which of the following is known as calomel?
    a) Silver chloride
    b) Mercury chloride
    c) Potassium chloride
    d) Mercury sulphate
A

b) Mercury chloride

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25
Q
  1. The calomel electrodes are classified based on which of
    the following?
    a) Materials used in the electrode
    b) Amount of mercury present
    c) Concentration of Kcl
    d) Purity of mercury
A

c) Concentration of Kcl

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26
Q
  1. Which of the following calomel electrodes are used for
    accurate work?
    a) Saturated calomel electrode
    b) Electrode with 0.1M Kcl
    c) Electrode with 1M Kcl
    d) Electrode with 2M Kcl
A

b) Electrode with 0.1M Kcl

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27
Q
  1. When the calomel electrode acts as the cathode which of the following does not occur?
    a) Mercury ions are discharged at the electrode
    b) More calomel passes into the solution
    c) There is a decrease in the concentration of chloride ions
    d) There is an increase in the concentration of chloride
    ions
A

d) There is an increase in the concentration of chloride
ions

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28
Q
  1. Calomel electrode can behave as which of the following
    components?
    a) Anode only
    b) Cathode only
    c) Anode or cathode
    d) Salt bridge
A

c) Anode or cathode

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29
Q
  1. Which of the following is not the characteristics of a
    calomel electrode?
    a) The potential of electrode is not temperature
    dependent
    b) Preparation of electrode is easy
    c) Value of potential or emf is higher for lower
    concentration of Kcl
    d) Value of potential decreases with increasing
    concentration of Kcl
A

a) The potential of electrode is not temperature
dependent

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30
Q
  1. Which of the following is not the characteristics of
    silver/silver chloride electrode?
    a) These electrodes have good electrical and chemical
    stability
    b) It can be used in temperatures greater than 600oC
    c) It can be used in places or solutions that have strong
    reducing agents
    d) It should not be used in solutions that contain proteins,
    sulphide or bromide
A

c) It can be used in places or solutions that have strong
reducing agents

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30
Q
  1. While using reference electrodes, the internal liquid
    level should always be kept above that of the sample
    solution.
    a) True
    b) False
A

a) True

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31
Q
  1. Which of the following salt bridge solutions must be used for silver/silver chloride electrode?
    a) Saturated KCl
    b) Saturated K2SO4
    c) Saturated LiCl
    d) Saturated KNO3
A

a) Saturated KCl

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32
Q
  1. LiCl salt bridge is more suitable in organic solvents than
    KCl.
    a) True
    b) False
A

a) True

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33
Q
  1. Good choice for storing combination electrodes is in a buffer solution having which of the following pH?
    a) pH1
    b) pH2
    c) pH3
    d) pH4
A

d) pH4

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34
Q
  1. Which of the following is not the advantage of gel-filled
    electrodes?
    a) Low maintenance
    b) Rugged in construction
    c) Easy to maintain
    d) Does not cause clogging
A

d) Does not cause clogging

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35
Q
  1. The gel used in combination electrodes does not have which of the following characteristic?
    a) Non-toxic
    b) USP grade
    c) Inorganic material
    d) Polyacrylamide
A

c) Inorganic material

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36
Q
  1. Beckman coulter gel filled combination electrodes
    provide which of the following features to overcome
    various problems that occur in gel filled electrodes?
    a) Filters
    b) Semi-permeable membrane
    c) Gas-permeable membrane
    d) Micro-pore junction
A

d) Micro-pore junction

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36
Q
  1. In which of the following solutions must combination electrodes be soaked after cleaning?
    a) KCl
    b) LiCl
    c) KNO3
    d) K2SO4
A

a) KCl

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37
Q
  1. Gel filled combination electrodes operate in a wide
    temperature range.
    a) True
    b) False
A

a) True

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38
Q
  1. pH meters can be considered as voltage sources with
    which of the following internal resistances?
    a) Very low resistance
    b) Moderate resistance
    c) Very high resistance
    d) No resistance
A

c) Very high resistance

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38
Q
  1. The electrodes used in pH measurement have which of
    the following internal resistances?
    a) Very low resistance
    b) Moderate resistance
    c) Very high resistance
    d) No resistance
A

c) Very high resistance

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38
Q
  1. In combination electrodes, both the electrodes must
    be maintained at different temperatures.
    a) True
    b) False
A

b) False

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39
Q
  1. Which of the following is the simplest of pH meters?
    a) Null-detector type pH meter
    b) Direct reading type pH meter
    c) Digital pH meter
    d) Modern pH meter
A

a) Null-detector type pH meter

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40
Q
  1. Which of the following is not a failure in pH meters?
    a) Defective electrodes
    b) Defective input circuitry
    c) Defective electronic circuitry
    d) Defective calibration
A

d) Defective calibration

41
Q
  1. In which of the following ways can zero drift be reduced
    in pH meters?
    a) Using filter
    b) Giving zero adjustment arrangement
    c) Keeping the input impedance high
    d) Using balanced and differential amplifiers
A

d) Using balanced and differential amplifiers

41
Q
  1. Which of the following can be used to provide
    automatic temperature compensation?
    a) Proper insulation
    b) Calibration for different temperatures
    c) Thermistor
    d) Thermometer
A

c) Thermistor

42
Q
  1. Which of the following is not the characteristic of null
    detector type pH meter?
    a) It can be battery operated
    b) It has less accuracy
    c) It is easy to maintain
    d) Its electronic circuits are simple
A

b) It has less accuracy

42
Q
  1. Which of the following is not the characteristic of direct
    reading type pH meters?
    a) Simple operation
    b) Quick to use
    c) Continuous indication output
    d) It requires balancing process
A

d) It requires balancing process

43
Q
  1. Which of the following is not the characteristic of
    chopper amplifier pH meter?
    a) Direct voltage from the electrodes is chopped at the
    main frequency
    b) Using choppers for high-input resistance gives rise to spikes of waveforms at the output
    c) It leads to stability in DC output of phase-sensitive
    rectifier
    d) Magnitude of surge increases in the glass electrode
    output
A

c) It leads to stability in DC output of phase-sensitive
rectifier

44
Q
  1. In which of the following ways can the disadvantages of chopper amplifier type pH meter be overcome?
    a) Using zero corrected DC amplifier
    b) Using modern design
    c) Using digital design
    d) Using vibrating condenser
A

d) Using vibrating condenser

45
Q
  1. The zero stability of vibrating condenser amplifier type
    pH meter is much better than a direct coupled amplifier.
    a) True
    b) False
A

a) True

46
Q
  1. In vibrating condenser amplifier type pH meter, to
    maintain good performance which of the following has to
    be done?
    a) Frequency of the vibrator should be stable
    b) Frequency of the vibrator should be constant
    c) Amplitude of the vibrator should be constant
    d) Both frequency and amplitude of the vibrator should be
A

d) Both frequency and amplitude of the vibrator should be

46
Q
  1. If an instrument fails to balance at zero, it is most likely
    that the electrodes are defective.
    a) True
    b) False
A

b) False

47
Q
  1. Which of the following is not the characteristic of ion
    selective electrodes?
    a) It is fragile
    b) Easy to use
    c) Available in different sizes and shapes
    d) It is insensitive to many ions
A

a) It is fragile

48
Q
  1. In glass membrane electrode, the glass containing 11% Na2O, 18% Al2O3, 71% SiO2 is highly sensitive to which of the following ions?
    a) Sodium
    b) Hydrogen
    c) Nitrogen
    d) Chlorine
    View Answer
A

a) Sodium

49
Q
  1. In liquid membrane electrode, the liquid ion exchanger is held in a porous disc of _____________
    a) Solid material
    b) Semi-permeable membrane
    c) Hydrophobic material
    d) Water absorbing material
A

c) Hydrophobic material

50
Q
  1. In recent liquid membrane electrodes, the porous liquid membrane is replaced with which of the following?
    a) Polyvinyl chloride
    b) Polyacryl chloride
    c) Polyester membrane
    d) Polyacryl amide
A

a) Polyvinyl chloride

51
Q
  1. Which of the following is used in potassium electrode in liquid membrane electrodes?
    a) Ionomycin
    b) Valinomycin
    c) Nonactin
    d) Gramicidin
A

b) Valinomycin

52
Q
  1. In solid state membranes, the body of the electrodes are made of which of the following?
    a) Polyvinyl chloride
    b) Plastic
    c) Polythene
    d) Teflon
A

d) Teflon

53
Q
  1. Which of the following is not the characteristic of ion
    selective electrodes?
    a) Simple to use
    b) Inexpensive
    c) Narrow concentration range
    d) Operates in wide range of temperature
A

c) Narrow concentration range

54
Q
  1. Which of the following is not a problem of ion selective electrodes?
    a) Interference with other ions
    b) Output is influences by ionic strength
    c) Drift in electrode potential during a sequence of
    measurements
    d) Can measure only positive ions
A

d) Can measure only positive ions

54
Q
  1. Ion selective electrode are unaffected by colour or
    turbidity of the solution.
    a) True
    b) False
A

a) True

55
Q
  1. Which of the following is the effective concentration
    measured at the electrode head?
    a) Selectivity coefficient
    b) Ionic strength
    c) Activity
    d) Activity coefficient
A

c) Activity

56
Q
  1. The value of activity coefficient is always in which of
    the following ranges?
    a) Zero
    b) Less than zero
    c) Less than 1
    d) Greater than 1
A

c) Less than 1

57
Q
  1. Which of the following specifies the relation between
    ionic strength and activity coefficient?
    a) Directly proportional
    b) Inversely proportional
    c) Equal
    d) No particular relation
A

b) Inversely proportional

58
Q
  1. The difference between measured activity and actual concentration becomes higher at higher concentration. Is this statement true or false?
    a) True
    b) False
A

a) True

59
Q
  1. In Ammonia electrode, diffusion of dissolved ammonia
    occurs through the membrane until which of the following
    conditions occur?
    a) Concentration becomes equal on both sides
    b) Activity becomes equal on both sides
    c) Partial pressure becomes equal on both sides
    d) Differential pressure is low
A

c) Partial pressure becomes equal on both sides

59
Q
  1. Ion selective electrodes have ________ linear range
    and _________ detection limit than the pH electrode.
    a) Lower, lower
    b) Lower, higher
    c) Higher, lower
    d) Higher, higher
A

b) Lower, highe

60
Q
  1. When electrode potential response is plotted as a
    function of ammonia concentration on a semi-log graph,
    the graph obtained will be ____________
    a) A straight line
    b) Parabolic
    c) Sigmoidal
    d) A curve
A

a) A straight line

61
Q
  1. In fluoride ion electrode, the potential corresponding to level of the fluoride ion is described by which of the following equations when E is the measured electrode potential, Eo is the reference potential and A is the level of
    fluoride ions in solution?
    a) E=Eo+0.0591 log A
    b) E=Eo-0.0591 log A
    c) E=Eo+0.0896 log A
    d) E=Eo-0.0896 log A
A

b) E=Eo-0.0591 log A

62
Q
  1. How can samples above 1M in ammonia concentration be measured using ammonia electrode?
    a) It must be diluted and measured
    b) It cannot be measured
    c) The electrode has to be modified for measuring
    d) It can be measured directly
A

a) It must be diluted and measured

63
Q
  1. The dilution of solution must not reduce the level of
    ammonia below _________
    a) 10-2 M
    b) 10-5 M
    c) 10-8 M
    d) 10-9 M
A

b) 10-5 M

64
Q
  1. Which of the following factors does not the
    reproducibility of the ammonia electrode?
    a) Temperature
    b) Drift
    c) Noise
    d) Dilution
A

d) Dilution

65
Q
  1. The performance of ammonia electrode is not affected by sample colour and turbidity.
    a) True
    b) False
A

a) True

66
Q
  1. What does TISAB which is used to overcome
    interferences stand for?
    a) Total Isolation Strength Absolute Buffer
    b) Total Ionic Strength Absolute Buffer
    c) Total Ionic Strength Adjustment Buffer
    d) Total Isolation Strength Adjustment Buffer
A

c) Total Ionic Strength Adjustment Buffer

67
Q
  1. Which of the following causes main interference in
    Fluoride electrode?
    a) H+ ions
    b) OH– ions
    c) Li+ ions
    d) Cl– ions
A

b) OH– ions

68
Q
  1. Which of the following gas permeable membrane is
    used for ammonia gas sensing electrode?
    a) Silicon rubber
    b) Microporous Teflon membrane
    c) Fluorocarbon
    d) Polythene
A

c) Fluorocarbon

68
Q
  1. Crystal membrane of ion selective electrode can be
    regenerated by washing with which of the following?
    a) Alcohol
    b) Iodine solution
    c) Acidic solution
    d) Basic solution
A

a) Alcohol

69
Q
  1. For fluoride electrode, the electrode response curve will not only shift but will change slope with changes in temperature.
    a) True
    b) False
A

a) True

70
Q
  1. Which of the following gas permeable membrane is
    used for carbon dioxide gas sensing electrode?
    a) Silicon rubber
    b) PVC membrane
    c) Fluorocarbon
    d) Polythene
A

a) Silicon rubber

71
Q
  1. The response time of the biocatalytic membrane
    electrode is poor when used with complex organic
    molecules.
    a) True
    b) False
A

b) False

72
Q
  1. Which of the following reference electrode is placed in the solution of carbon dioxide electrode?
    a) Calomel electrode
    b) Silver/silver chloride electrode
    c) Mercury/mercury sulphate electrode
    d) Glass electrode
A
73
Q
  1. Biocatalytic membrane electrode cannot be used for the
    measurement of which of the following gases?
    a) Ammonia
    b) Carbon dioxide
    c) Hydrogen
    d) Nitrogen
A

d) Nitrogen

74
Q
  1. The biocatalytic membrane used in the ammonia
    selective electrode is which of the following?
    a) Urea
    b) Urease
    c) Acrylamide
    d) Polyacrylamide
A

b) Urease

75
Q
  1. Which of the following materials are used as a gel to
    which biocatalytic membrane is fixed in ammonia selective
    electrode?
    a) Urea
    b) Urease
    c) Acrylamide
    d) Polyacrylamide
A

c) Acrylamide

76
Q
  1. If a solid or liquid membrane is placed in pure water, the membrane dissolves slightly, producing an equilibrium concentration of the measured ion. This is represented as
    __________
    a) A constant, Eo
    b) Activity
    c) Blank correction, Cb
    d) Concentration of standard solution, Cs
A

c) Blank correction, Cb

77
Q
  1. The biocatalytic membrane is attached to the glass
    electrode using which of the following materials?
    a) Nylon mesh
    b) Teflon
    c) Silicon rubber
    d) Polythene
A

a) Nylon mesh

78
Q
  1. The response time of the biocatalytic electrode is a
    function of the thickness of the enzyme layer.
    a) True
    b) False
A

a) True

79
Q
  1. In carbon dioxide electrode, the membrane separates
    which of the following?
    a) Sodium carbonate, magnesium chloride
    b) Magnesium hydrogen carbonate, sodium chloride
    c) Sodium hydrogen carbonate, sodium chloride
    d) Magnesium carbonate, magnesium chloride
A

b) Magnesium hydrogen carbonate, sodium chloride

80
Q
  1. During which of the following conditions is the blank
    correction not necessary?
    a) If sample concentration rises in linear response region
    b) If sample concentration falls in linear response region
    c) If sample concentration rises in non-linear response
    region
    d) If sample concentration falls in non-linear response
    region
    View Answer
A

b) If sample concentration falls in linear response region

81
Q
  1. During which of the following conditions is the blank
    correction necessary?
    a) If sample concentration rises in linear response region
    b) If sample concentration falls in linear response region
    c) If sample concentration rises in non-linear response
    region
    d) If sample concentration falls in non-linear response
    region
A

d) If sample concentration falls in non-linear response
region

82
Q
  1. Ion analysers need calibration once in which of the
    following durations?
    a) Every two or three hours
    b) Every nine or ten hours
    c) Every 24 hours
    d) Every 48 hours
A

a) Every two or three hours

83
Q
  1. In ion analysers, which of the following serve the dual
    purpose of controlling the operating current of FET and
    providing current gain?
    a) FET itself does it
    b) SCR
    c) Op-amp
    d) Diode
A

c) Op-amp

84
Q
  1. The presence of dirt or moisture degrades which of the
    following?
    a) Circuit components
    b) High input impedance of buffer amplifier
    c) Low input impedance of buffer amplifier
    d) Low output impedance of buffer amplifier
A

b) High input impedance of buffer amplifier

85
Q
  1. Which of the following is not a type of ground in ion
    analyser?
    a) Chassis and electrostatic ground
    b) Digital ground
    c) Analog ground
    d) Reference ground
A

d) Reference ground

86
Q
  1. The timing for a microprocessor and for all signals is
    generated by the CPU clock.
    a) True
    b) False
A

a) True

87
Q
  1. Which of the following is the only operator entry
    required in PC-based ion analysers?
    a) Hardware set-up
    b) Signal measurement
    c) Calibration
    d) Sample calculation
A

c) Calibration

88
Q
  1. The analog and digital grounds are connected together
    in ion analysers.
    a) True
    b) False
A

b) False

89
Q
  1. Which of the following is not a characteristic of the
    immobilized enzymes?
    a) They cannot be re-used
    b) It produces reproducible results
    c) Stability exists
    d) Same catalytic activity is present for number of analysis
A

c) Stability exists

90
Q
  1. Which of the following is not a characteristic of the
    immobilized enzymes?
    a) They cannot be re-used
    b) It produces reproducible results
    c) Stability exists
    d) Same catalytic activity is present for number of analysis
A

a) They cannot be re-used

91
Q
  1. Which of the following is the physico-chemical
    component?
    a) Enzymes
    b) Anti-bodies
    c) Transducer
    d) Cells or tissues
A

c) Transducer

92
Q
  1. An example of biosensor, urea electrode makes use of
    which of the following electrodes?
    a) Carbon dioxide electrode
    b) Ammonia electrode
    c) Fluoride electrode
    d) Ammonium electrode
A

d) Ammonium electrode

93
Q
  1. In glucose electrode, glucose oxidase has been coupled to an electrode by which of the following materials?
    a) Ferrocene derivatives
    b) Urease
    c) Polyacrylamide
    d) Biochips
A

a) Ferrocene derivatives

94
Q
  1. Biosensors measure glucose concentrations between which of the following ranges?
    a) 10-1 to 10-2 M
    b) 10-2 to 10-4 M
    c) 10-1 to 10-4 M
    d) 10-1 to 10-7 M
A

d) 10-1 to 10-7 M

95
Q
  1. Transducers employed in the bulk of enzyme electrodes use which of the following principles?
    a) Amperometric
    b) Optical
    c) Magnetic
    d) Colorimetric
A

a) Amperometric

96
Q
  1. Which of these biosensors use the principle of heat
    released or absorbed by a reaction?
    a) Potentiometric biosensor
    b) Optical biosensors
    c) Piezo-electric biosensors
    d) Calorimetric biosensors
A

d) Calorimetric biosensors

97
Q
  1. Which of the following biosensors use the movement of electrons produced during redox reactions?
    a) Amperometric biosensor
    b) Potentiometric biosensors
    c) Piezo-electric biosensors
A

a) Amperometric biosensor

98
Q
  1. Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.
    a) True
    b) False
A

b) False

99
Q
  1. In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.
    a) True
    b) False
A

a) True

100
Q
  1. For constructing the glucose sensor, which of the
    following is used as a gel?
    a) Urea
    b) Urease
    c) Acrylamide
    d) Polyacrylamide
A

d) Polyacrylamide

Chemical Technician (Analytical Chemistry) (16 decks)

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