Pharmaceutical Analysis - I - MCQ's

Part - I

1.Atomic spectroscopy deals with radiation of wavelength

  1. 1-200 nm
  2. 200-800 nm
  3. 2.5-16 micrometer
  4. 400-800 nm

2. Flame photometry is a type of

  1. Atomic emmision spectroscopy
  2. Atomic fluroscence spectroscopy
  3. Atomic absorption spectroscopy
  4. None of these

3. Nebulization refers to

  1. Evaporation
  2. Liquid converted to spray
  3. Condensation
  4. Solidification

4. Atomization refers to

  1. Evaporation
  2. Atom formation from molecule
  3. Breaking of atom
  4. None of these

5. The part of molecule involved in Atomic Spectroscopy is

  1. Valence electron
  2. Nucleus
  3. Inner electron
  4. Protons

6. The number of lines observed in atomic spectra are

  1. Always fix
  2. Changes
  3. Depends on excitation source
  4. None of these

7. In atomic spectra, Doppler effect is due to

  1. Line wavelength
  2. Line intensity
  3. Line width
  4. None of these

8. In atomic spectra, Zeeman line broadening is due to

  1. Ionised atom
  2. High concentration
  3. Magnetic field
  4. None of these

9.Inner side of the cathod in hollow cathod lamp is coated with

  1. Mercury
  2. Tungstun salt
  3. Hydrogen
  4. None of these

10. To prevent ionisation of the analyte in atomic spectroscopy, one can use

  1. Ionisation buffer
  2. pH buffer
  3. Electric buffer
  4. Any one of these

11. IP 2007 method for assay of Sodium and Potassium in ORS is

  1. HPLC
  2. Complexometry
  3. Argentometry
  4. Flame photometry

12. Flame photometry is widely used for analysis of

  1. Amino Acids
  2. Fats and oils
  3. Carbohydrates
  4. None of these

13 Number of elements which can be analysed by AES largely depends on

  1. Energy of excitation source
  2. Type of detector
  3. Type of slit
  4. None of these

14 In IR spectroscoy, waves are described by

  1. Wavelength
  2. Wave
  3. Frequency
  4. All

15. Change in bond angle in molecule is called

  1. Stretching
  2. Bending
  3. Symmetrical stetching
  4. None of these

16. Wave number considered as finger print region is in range of________cm-1

  1. 700-1400
  2. 400-700
  3. 1400-4000
  4. None of these

17.Minimum structural requirement for IR specta is

  1. Conjugated double bond
  2. Aromatic
  3. Non-aromatic
  4. Any one of these

18.All the vibrations in IR Spectroscopy

  1. Must be IR active
  2. May be IR active or may not be
  3. Must be IR inactive
  4. None of these

19. Energy required for bending vibration must always be ______than that of stretching

  1. Same
  2. More
  3. Less
  4. Unpredictable

20. Weak absorption band appearing at double the frequency of fundamental band is

  1. Combination tone
  2. Fermi resonanc
  3. Coupling
  4. None of these

21. Radiation source used for IR spectroscopy is

  1. Deuterium lamp
  2. Xenon lamp
  3. Tungstun lamp
  4. Globar

22 Commanly used optical instruments for IR spectroscopy are made from

  1. Glass
  2. Plastic
  3. Rubber
  4. KBr

23 For polymorphs study,best method is

  1. UV-Visible spectroscopy
  2. Fluorimetry
  3. Mass spectroscopy
  4. None of these

24 For conformational isomers study, best method is

  1. NMR spectroscopy
  2. Radiochemical analysis
  3. Mass spectroscopy
  4. IR spectroscopy

25 Moderate intensity IR peaks in 700-900 cm-1indicate prescence of

  1. Hydrocarbon
  2. Aldehyde
  3. Aromatic hydrocarbon
  4. Ketone

26. Low intensity doublet around 3400 cm-1 indicate presence of

  1. Phenol
  2. Primary am
  3. Hydrocarbon
  4. Aldehyde

27. Very strong absorption band around 1715 cm-1 indicate presence of

  1. Aldehyde
  2. Amide
  3. Ketone
  4. Anhydride

28. In a molecule, the part responsible for IR absorption is

  1. Ionic bond
  2. Double bond
  3. Conjugated double bond
  4. Any covelant bond

29. Fast responding IR detector is

  1. Thermocouple
  2. Golay polyneumatic detector
  3. Pyroelectric detector
  4. None of these

30 Interaction type in NMR is

  1. Valence electron
  2. Scattering of radiation
  3. Emission of radiation
  4. Absorption of radiation

31 Neuclear properties are described by

  1. Spin number
  2. Magnetic moments
  3. Magnetogyratic ratio
  4. All of these

32 Frequency of radio wave is

  1. 1-100 Hz
  2. 1-100 KHz
  3. 1-100 MHz
  4. None of these

33 When atomic mass is even and atomic number is also even then nucleus of those

  1. Does absorb radiowaves
  2. Does not absorb radiowave
  3. Emmit radiation
  4. None

34 Precession is the movement of

  1. Nucleus around its axis
  2. Electron around eachother
  3. Electron around nucleus
  4. None of these

35 Absorption of radiowave takes place when radio frequency matches with

  1. Precessional frequency
  2. Vibrational frequency
  3. Spin frequency
  4. Rotational frequency

36 NMR instruments are classified on bases of

  1. The type of nuclei
  2. Strength of magnet
  3. Mode of working
  4. All of these

37 Chemical shifts are expressed by

  1. Taur
  2. Hertz
  3. Delta
  4. All of these

38 The type of protons in the PMR can be identified from

  1. Strength of magnet
  2. Delta value
  3. Intensity of the absorption peak
  4. Mode of instrument

39 Transition metal in NMR spectroscopy behaves as

  1. Ferromagnetic
  2. Paramagnetic
  3. Diamagnetic
  4. None of these

40 Probable reason for high delta value of vInyl hydrogen is

  1. Diamagnetism
  2. Diamagnetic anisotropy
  3. High electron density
  4. Unsaturation

41 Two chemical bond distance exists between

  1. Isomeric proton
  2. vecinal proton
  3. Geminal proton
  4. Homogenic proton

42 Coupling constant has unit of

  1. Tesla
  2. Hertz
  3. Gauss
  4. Delta

43 For simple coupling ratio of ΔV/J must be

  1. Less than 10
  2. More than 10
  3. Less than 1
  4. More than 100

44 Complex splitting can be simplified by

  1. Shift reagent
  2. Spin decoupling
  3. Double irradiation
  4. All of these

45 PMR spectra provides information about

  1. Concentration
  2. Types of protons
  3. Number of neighbouring protons
  4. All of these

46 % of keto form in keto-enol tautomerism can be found by

  1. IR spectroscopy
  2. MASS spectroscopy
  3. NMR spectroscopy
  4. HPLC

47 Normal range of delta value in HNMR is

  1. 1-100
  2. 0-200
  3. 0-10
  4. 10-100

48 Delta value in 13C-NMR , largely depends on

  1. Diamagnetism
  2. Hybridisation
  3. Resonance
  4. Geometry

49. Gamma effect of any attachment, in 13C- NMR is

  1. Very high
  2. Very low
  3. Positive
  4. Negative

50. In PMR spectra,Delta value for aromatic hydrogen is around

  1. 1
  2. 7.2
  3. 5.2
  4. 9.6

51 In PMR spectra,Delta value for highly acidic hydrogen is around

  1. 1
  2. 7.3
  3. 5.2
  4. None of these

52 Dalton is a unit of

  1. Energy
  2. Pressure
  3. Charge
  4. None

53 Very small unit of energy is

  1. Calorie
  2. Joule
  3. Electron Volt
  4. Erg

54 Mass spectrometer requires

  1. High temprature
  2. High cooling
  3. High vaccume
  4. High pressure

55 Highest m/z peak in mass spectrum is called as

  1. Base peak
  2. Fragment peak
  3. Isotopic peak
  4. Parent peak

56 The physical state of sample required for mass spectrometry is

  1. Gas
  2. liquid
  3. Solid
  4. All of these

57 In EI mass instrument, sample is usually in

  1. Gas
  2. Liquid
  3. Solid
  4. All of these

58 Tandem mass instrument refers to

  1. MALI-TOF
  2. ESI-TOF
  3. MS-MS
  4. Iontrape

59 Mass spectrometer are classified on the basis of

  1. Resolution
  2. Ionisation
  3. Separation
  4. All of these

60 Intensity of isotopic ion peak largely depends on

  1. Instrument sensitivity
  2. Isotope abundance
  3. Detector
  4. None of these

61 Triply charged anion peak has intensity in mass spectrum is

  1. 1/3 of mass
  2. Zero
  3. 3 times of mass
  4. None of these

62 Base peak of 91 Da confirms the presence of

  1. Phenol
  2. Aniline
  3. Arene
  4. Alcohol

63 M-1 peak has high intensity in the case of

  1. Phenol
  2. Alcohol
  3. Aldehyde
  4. Ester

64. If a mass spectrography can separate mass of 2000 Da and 2001 Da clearly, then the resolution is

  1. 2000
  2. 2001
  3. 1999
  4. 200

65. Mass spectrometry is not suitable for

  1. Identification
  2. Assay
  3. Structure ellucidation
  4. All of these

66. Drug metabolite study can be best done by

  1. UV-Visible spectroscopy
  2. GC-MS
  3. LC-MS
  4. NMR spectroscopy

67. Dates of formation of an ancient object can be studied by

  1. X-RAY spectrometry
  2. IR spectrometry
  3. HPLC
  4. Mass spectrometry

68. Exicited singlet to ground state singlet produces

  1. Absorption
  2. Fluroscence
  3. Phosphorescence
  4. None Of these

69. Minimum Structure required to have fluroscence is

  1. Conjugated double bond
  2. Aromatic Ring
  3. Substituted Aromatic ring
  4. None of these

70. Relation between fluroscence & concentration of analyte is

  1. Direct proportional
  2. Indirect proportional
  3. Direct & Indirect both
  4. None of these

71. In Fluorimeter , excitation , radiation is obtained by

  1. Monochromater
  2. Primary filter
  3. Secondary filter
  4. Another radiation

72. Most Common radiation source for Fluorimeter is

  1. Tungstun lamp
  2. Deutarium lamp
  3. Holmium lamp
  4. Xenone lamp

73. In Compendia , Fluorimeter is prescribed for

  1. Identification
  2. Limit test
  3. Assay
  4. All Of the Above

74. Quantum yield of fluroscencewill always be

  1. More than 100
  2. Less than 100
  3. Less than 1
  4. More than 1000

75. Concentration reversal is common in

  1. UV-Visible spectrometry
  2. IR spectrometry
  3. Fluorimetry
  4. Mass spectrometry

76. Relation between fluroscence and intensity of radiation source is

  1. Inverse
  2. Direct
  3. No Relation
  4. Complex

77. Relation between molar absorpptivity and fluroscence is

  1. Inverse
  2. Direct
  3. No Relation
  4. Complex

78. Non fluroscence compound can be analysed by Fluorimetry by

  1. Modifying Structure
  2. Attaching fluorogenic group
  3. Quenchofluorimetry
  4. Any of these

79. FIA is Abbrevation of

  1. Fluroscence improved analysis
  2. Fluroscence impurity assay
  3. fluroscence interactive analysis
  4. None Of These

80. In day light , fluroscence can be viewed as

  1. Dark Colour
  2. Colourless
  3. Double Colour
  4. Pale Colour

81. Electrodes Pair required for potential measurement are

  1. Reference- working electrodes
  2. Both working electrodes
  3. Both Reference electrodes
  4. Auxiliary - working electrodes

82. Cell used to standardize potentiometer is

  1. Daniel Cell
  2. Weston Cell
  3. Button Cell
  4. None of these

83. If Small Positive potential is applied to reference electrode then

  1. Increase Positive potential
  2. Decrease Positive potential
  3. Becomes Negative
  4. No charge in potential

84. Indicator electrode commonly used in potentiometer is

  1. Calomel electrode
  2. Platinum electrode
  3. Glass electrode
  4. Copper electrode

85. To find potential at any concentration using standard potential , we use

  1. Illkovik equation
  2. Bragg's equation
  3. Beer's equation
  4. None of these

86. Nitrate titration of IP-2007 do not involve measurement of

  1. potential
  2. Current
  3. Dead stop end point
  4. Conductance

87. Sulfadiazine can be assayed by

  1. Amperometry
  2. Biamperometry
  3. Potentiometry
  4. All of these

88. Sulfamethoxazole can be assayed by

  1. Amperometry
  2. Biamperometry
  3. Potentiometry
  4. All of these

89. An antioxidant must have standard Reduction potential______ as than that of drug

  1. More
  2. Less
  3. Same
  4. None of these

90. In IP-2007 , Nitrate titration uses ______ as an indicator

  1. pH meter
  2. Potentiometer
  3. Ferroin
  4. Conductometer

91. Working range of polarography is

  1. ± 0.5 Volt
  2. ± 10 Volts
  3. ± 5 Volts
  4. None of these

92. Polarograph is

  1. Current Vs Volt Graph
  2. DME
  3. Instrument
  4. None of these

93. Diffusion Current is not due to

  1. Migration of ions
  2. Convention of ions
  3. Heating of solution
  4. All of these

94. Residual currrent in polarography is due to

  1. Oxidisable impurity
  2. Reducible impurity
  3. Analyte
  4. All of these

95. In polarography supporting electrodes must be having

  1. Low Reduction potential
  2. High concentration
  3. High Reduction potential
  4. High concentration & high Reduction potential

96. Commonly used polarographic maxima supressor is

  1. Glucose
  2. Glycerine
  3. Gelatin
  4. Sodium Carbonate

97. Entire polarography is carried out is absence of________gas

  1. Nitrogen
  2. Carbon Dioxide
  3. Moisture
  4. Oxygen

98.In polarography , Migration currrent can be blocked by adding

  1. Oxygen
  2. KCl
  3. Gelatin
  4. Glucose

99. Diffusion current can be correlated with different conditions by

  1. Bragg's equation
  2. Nernst equation
  3. Illkovik equation
  4. Beer's equation

100.Diffusion current & Concentration of analyte have_______relationship

  1. Directly proportional
  2. Inversely proportional
  3. No
  4. Logarithmic

Part - II

1. Calculate the λmax of the given structure

  1. 250
  2. 320
  3. 348
  4. 387

2. What will be the effect of hydrogen bonding on vibrational frequency in I.R spectra?

  1. increase the wave number
  2. decrease the wave number
  3. decrease the wave length
  4. Does not affect the wavelength

3. In I.R. bending vibrations(Deformations) , the movement of atoms takes place in the same direction is known as

  1. Scissoring
  2. Rocking
  3. Wagging
  4. Twisting

4. Which one of the following factors does not affect the chemical shift?

  1. Inductive
  2. Anisotropic effect
  3. Concentration
  4. Hydrogen bonding

5. Bathochromic shift is also known as

  1. Hypochromic shift
  2. Hyper Chromic shift
  3. Red shift
  4. Hypsochromic shift

6. Which one of the following drugs is assayed by dissolving in glacial acetic acid and titrated with standard perchloric acid using orcet blue as indicator

  1. Paracetamol IP
  2. Salbutamol Sulphide IP
  3. Isoniazid IP
  4. Asrpirin IP

7. One of these detectors is not used in gas chromatoghraphy

  1. Flame Ionisation
  2. Thermal conductivity
  3. Golay
  4. Electron capture

8. Nuclear Magnetic movement is shown by

  1. 12C
  2. 16O
  3. 32S
  4. 15N

9. Which types of radiation has the wavelength between 2.5 - 50µm in electromagnetic Spectrum?

  1. UV light
  2. Near IR
  3. Mid-IR
  4. Far IR

10. Free Radical substance showing paramagnetism due to the magnetic movement of unpaired electron , which spectrography is applied for its determination?

  1. NMR
  2. ESR
  3. IR
  4. PMR

11. Conductance cells for conductivity measurements can be made from one of the following metal

  1. Potassium
  2. Sodium
  3. Platinum
  4. Stainless Steel

12. The Scientists were awarded Noble Prize in Physics for Phenomenon of NMR

  1. Henery & Moseley
  2. Flix Bloch & Edward M. Purcell
  3. Beer & Lambert
  4. Frederic William Herchel

13. Absorption band originates due to n-∏* transition of a single chromophoric group is

  1. K-band
  2. B-band
  3. E-band
  4. R-band

14. What will be the wave number of infrared light of wavelength 10µm?

  1. 100cm-1
  2. 1000cm-1
  3. 104cm-1
  4. 105cm-1

15. A detector works on the principle that if wires of two dissimilar metals are joined head to tail, then a difference in temperature between both causes a current to flow

  1. Bolometer
  2. Photovoltaic
  3. Thermocouple
  4. Pneumatic

16. Calculate the molar absorpptivity , ε , for a solution containing 1.0 mmol dm-3(1.0 х 10-3 mole per litre) of solute, when the absorbance of 1cm cell was 1.5

  1. 1200
  2. 1500
  3. 900
  4. 5000

17. Mass - Mass spectrometer also known as

  1. Double focusing
  2. Electrospray desorption
  3. Tandem
  4. Quadrupol

18. If Molecular weight of parent ion is 77 and further it breaks in metastable ion and daughter ion of molecular weight 51. Then Calculate metastable ion.

  1. 48.2
  2. 33.4
  3. 63.2
  4. 48

19. If Analytical work has to be carried out in UV region , cuvette must be made up of

  1. Gelatin
  2. Glass
  3. Plastic
  4. Quartz

20. The source of radiation used in I.R. spectroscopy

  1. Nernst glower
  2. Sodium lamp
  3. Deuterium lamp
  4. Tungstun lamp

21. Reduction in the intensity of fluorescence is called as

  1. Suppression
  2. Depression
  3. Sedation
  4. Quenching

22. In TLC plates , which one spraying agent is used for alkaliod sample?

  1. 2,4-dinitrophenyl hydrazine
  2. Mercuric nitrate
  3. Antimony trichloride
  4. Aniline phthalate

23. The transition between a triplet excited state and singlet excited state is known as

  1. Allowed
  2. Forbidden
  3. Both
  4. None of these

24. The time from point of injection of sample to the time of elution of separated component from the column is known as

  1. Retention time
  2. Retardation time
  3. Separation time
  4. Mean time

25. Silver-silver chloride reference electrode is made up of

  1. Copper wire coated with copper chloride
  2. Sodium wire coated with Sodium chloride
  3. Mercury with Calomel
  4. Silver wire coated with silver chloride

26. In Polarography any change in diffusion current is denoted by

  1. Illkovik equation
  2. Nernst equation
  3. Arrhenius equation
  4. Stock equation

27. In Acid base titration which electrode is used as indicator electrode.

  1. Platinum
  2. Glass
  3. Mercury
  4. Silver

28. ....... is used as supporting material in column in size exclusion chromatoghraphy.

  1. ODS
  2. TMS
  3. Agarose
  4. None of these

29. Sulpha drug are assayed by diazotization method , the titrant is used

  1. Sodium Nitrate
  2. Sodium nitrite
  3. Silver nitrite
  4. Silver Nitrate

30. Captopril IP is assayed by titration

  1. Against 0.1N sodium hydroxide using phenolphthalein indicator
  2. Of a Solution in dimethyl-formamide with 0.1M of tetrabutyl ammonium hydroxide.
  3. Of a solution in anhydrous formic acid and acetic anhydride with 0.1N perchloric acid.
  4. of a solution containing 1.8M sulphuric acid & potassium iodide with 0.025M potassium iodate using starch solution

31. Platinum foil is coated with platinum black in which type of electrode?

  1. Hydrogen
  2. Glass
  3. Mercury
  4. Silver

32. The equation θ = Sin-1(nλ ∕2d) is known as

  1. Nernst equation
  2. Illkovik equation
  3. Bragg's equation
  4. Arrhenius equation

33. The angle between the direction of the incident beam and that of diffracted beam is

  1. θ
  2. 2θ
  3. 3θ
  4. 4θ

34. The wave number 3000-3100 cm-1 is characteristic of the band

  1. -C=O
  2. -O-H
  3. -C-H(aromatic)
  4. –C≡ N

35. A dilute sulphuric solution is treated with 0.1 N ceric ammonium sulphate using ferrotin indicator is used for titration of

  1. Sulfadiazine tablet I.P.
  2. Salbutamol sulfate I.P.
  3. Riboflavin tablets I.P.
  4. Ascorbic acid tablet I.P.

36. If molecule size is greater than 2000 thsn it can be separated by

  1. HPLC
  2. HPTLC
  3. Size exclusion chromatoghraphy
  4. Gas-mass

37. In reverse phase HPLC

  1. Stationary phase is polar and mobile phase is non-polar
  2. Stationary phase is non-polar and mobile phase is polar
  3. Both phase are polar
  4. Both phase are non-polar

38. The current remains zero and graph is plotted between E versus volume of titrant in

  1. Amperometric titrations
  2. Potentiometric titrations
  3. Conductometric titrations
  4. Voltametry

39. Re- emission of previously absorbed radiation is Phenomenon of

  1. Scattering
  2. Flame photometry
  3. Luminescence
  4. Absorbance

40. Ferrous ion is very weakly colored for colorimetric analysis. It can be converted into a highly colored complex using

  1. H2SO4
  2. PDAB
  3. Thymol blue
  4. 1:10 - Phenanthroline

41. σ-σ* and n-σ* electronic transitions are possible in

  1. Benzene
  2. Toluene
  3. Bromine
  4. Naphthalene

42. The number of peaks shown by Iso propyl alcohol in an NMR spectrum is

  1. Four
  2. Two
  3. Three
  4. Five

43. In flame photometry , the flame temperature is attained by

  1. Acetylene
  2. Hydrogen
  3. Propane
  4. All

44. If the induced field reinforces the applied field the proton will be in NMR

  1. Shielded
  2. Deshielded
  3. No effect
  4. Red shift

45.A mixture of the following gases can be used in flame photometry to get a Temperature 31400C

  1. Hydrogen & Nitrous oxide
  2. Acetylene & oxygen
  3. Hydrogen & Air
  4. Hydrogen & Oxygen

46. Tesla is a unit used to express

  1. Frequency
  2. Pressure
  3. Voltage
  4. Magnetic field strength

47. A Polychromatic light source is used in

  1. UV spectrometer
  2. FT-IR spectrometer
  3. Spectroflurimeter
  4. IR spectrometer

48. E 1cm 1% (Absorptivity) of paracetamol is 740 and molecular weight is 151.6 than calculate molar absorption cofficient, ε

  1. 1121.84
  2. 11218.4
  3. 112.184
  4. None of these

49. Calculate λmax for 2, 4 pentadiene

  1. 215
  2. 220
  3. 217
  4. 222

50. Calculate the λmax for the P-hydroxybenzaldehyde in nm. Base value for Benzaldehyde in ethanol is 250 nm

  1. 253
  2. 275
  3. 261
  4. 270

Q.51 the B.P. assay of Nifedipine is by titration of a

  1. Solution in anhydrous acetic acid with 0.1M perchloric acid
  2. Solution in previously neutralized acetone with 0.1N sodium hydroxide; end point by potentiometry
  3. Solution in previously neutralized acetone against standard potassium dichromate solution
  4. A solution in 2-methyl- 2- propranol and perchloric acid with 0.1M cerium sulphate using ferroin as indicator

Q.52 which one of equation is related to column chromatography

  1. id = 708 nCD½ m2/3 t1/6
  2. VR = tR Fc
  3. E = E0 – RT log [H+]/n F
  4. A = εbc

Q.53 Polarography can be used for the

  1. To study fluorescent material
  2. Study of resistance of a solution
  3. Study of current potential relationship
  4. Study of optical activity of organic molecules

Q.54 Derivatization is done in gas chromatography for

  1. Improve the thermal stability of compounds
  2. Change the separation properties of compounds by the purposeful adjustment of their volatility
  3. Introduce a detector oriented tag into a molecule
  4. All of these

Q.55 how many signals are produced by methyl cyclopropane?

  1. two
  2. Three
  3. four
  4. five

Q.56 Hydrogen absorbency index and nitrogen rules are related to

  1. UV Spectroscopy
  2. IR Spectroscopy
  3. NMR Spectroscopy
  4. Mass Spectroscopy

Q.57 the Flame ionization detector is the most popular detector because of its

  1. High sensitivity
  2. Short range of linearity
  3. Low reliability
  4. Universal response

Q.58 which one of these is not a hyphenated technique?

  1. GC-MS
  2. GC-IR
  3. FT-IR
  4. MS-MS

Q.59 A thermistor detector functions by changing………when heated

  1. Frequency
  2. Pressure
  3. Voltage
  4. Resistance

Q.60 In NMR if the atom contains three nearby protons then these will produce

  1. Doublet
  2. Triplet
  3. Quartet
  4. Sestet

Q.61 0.25 g of a compound C10H15NO.HCl was titrated with 0.1 M HClO4.it consumed 12.5 ml of the titrant, Calculate the percentage purity of given sample

  1. 98.3
  2. 99.25
  3. 94.72
  4. 100.75

Q.62 Erichrome black T is used indicator in which type of titration?

  1. Neutralization
  2. Precipitation
  3. Redox
  4. Complexometric

Q.63 PYRIDOXINE HCl IP is dissolved in glacial acetic acid and then the inorganic reagent is added. What is the name of inorganic agent?

  1. Potassium Methoxide solution
  2. Mercuric acetate solution
  3. Tetra butyl ammonium hydroxide solution
  4. ceric ammonium sulphate solution

Q.64 which one of the following solvent is not used in NMR Spectroscopy?

  1. Carbon di sulfide
  2. Deuterated chloroform
  3. Carbon tetra chloride
  4. Water

Q.65 the reference material used in NMR Spectroscopy is

  1. Trimethyl silane
  2. Tetramethyl silane
  3. Both of these
  4. None of these

Q.66 ______produced in the fragmentation cannot be detected in the mass spectrometer.

  1. Neutral molecules
  2. Molecular ions
  3. Metastable ions
  4. Parent ions

Q.67 the pyroelectric detectors use ferroelectric materials operating below Curie point temperature is composed of

  1. Oxides of Mn, Co and Ni
  2. Bi-Sb
  3. Xenon
  4. Triglycin sulphate

Q.68 the most widely used material for preparing infrared cells for liquid samples and discs for solid samples is

  1. Potassium bromide
  2. Potassium chloride
  3. Sodium bromide
  4. Calcium bromide

Q.69 the main sources of infrared radiation used in spectrophotometers are except

  1. The Nernst glower
  2. Nicrome wire wound on ceramic support
  3. Mercury vapour lamp
  4. The Globar, a bonded silicon carbide rode

Q.70 The wave number 1720-1740 cm-1 for carbonyl group is characteristic band for

  1. Aldehyde
  2. Ketone
  3. Acid
  4. Esters

    5. Q.71 what is approximate wavelength of green color?

    1. 450-500 nm
    2. 500-570 nm
    3. 570-590 nm
    4. 590-620 nm

    Q.72 Sorensen apparatus is used for determination of

    1. Crystal growth
    2. pH scale
    3. HLB value
    4. Interparticular force

    Q.73 Chlormbucil is assayed as per IP by titrating a dilute acetone solution of the drug with

    1. 0.1 M sodium hydroxide
    2. 0.1 M hydrochloric acid
    3. 0.2 M perchloric acid
    4. 0.1 M silver nitrate

    Q.74 Official assay for the Glibenclamide is by titration using a standard solution of

    1. Sodium nitrite
    2. Iodine
    3. Potassium permanganate
    4. Sodium hydroxide

    Q.75 what will be the range of finger print region in cm-1 (wave number)

    1. 5000-1600
    2. 8000-1600
    3. 1600-600
    4. D) 3000-1600

    Q.76 In Fluorescence, the energy is emitted by

    1. Singlet
    2. Triplet
    3. Radical
    4. None

    Q.77 The Potential at the point on the polarographic wave where the current is equal to one half of the diffusion current is termed as

    1. Half wave current
    2. Full wave Current
    3. Half wave Potential
    4. Full wave Potential

    Q.78 which one is not a reference electrode

    1. Silver-silver chloride
    2. Mercury- calomel
    3. Dropping mercury
    4. Hydrogen

    Q.79 what is the unit of molar conductivity?

    1. mho
    2. Ω-1cm-1
    3. Ω-1cm2mol-1
    4. Ω-cm

    Q.80 in Conductometric titrations, one of the following is evaluated by calibration with 0.1M potassium chloride

    1. Distance between two electrodes
    2. Cell constant
    3. Area of cross section of each electrode
    4. Platinum wire of electrode

    Q.81 in Mass spectroscopy, positive charged in can be produced by

    1. Heating the sample
    2. Bombarding the sample with high energy electrons
    3. Bombarding the sample with high energy protons
    4. Bombarding the sample with high energy photons

    Q.82 if a proton is coupled with N other equivalent protons the number of peaks in multiplet is N+1 and the relative intensities of these multiplets are determined by

    1. Cram’s rule
    2. Pascal’s triangle
    3. Chemical shift
    4. Bedth’s rule

    Q.83 Parts per million (PPM) is unit for measurement of

    1. Coupling constant
    2. Wave number
    3. Base peak
    4. Chemical shift

    Q.84 In Mass Spectra, the peak that has highest relative abundance (100%) is known as

    1. Base
    2. Metastable ion
    3. Fragment ion
    4. Rearrangement ion

    Q.85 what is the mechanism of liquid chromatography for seperation of samples

    1. Adsorption
    2. Partition
    3. Absorbtion
    4. None of these

    Q.86 Octadecyl silane (C-18) column is used in………….chromatography.

    1. Ion Pair
    2. Size Exclusion
    3. Bonded Phase
    4. Ion exchange

    Q.87 Pulse damper is used with which type of reciprocating piston pumps

    1. Single head
    2. Dual head
    3. Triple head
    4. None of these

    Q.88 A sample is injected onto a given column and mobile phase is unchanged throughout the time required for sample components to elute from the column is known as

    1. Gradient elution
    2. Solvent programming
    3. Mobile phase elution
    4. Isocratic elution

    Q.89 The simplest form of preparative thin layer chromatoghraphy is to use

    1. Glass plate
    2. Aluminium plate
    3. Coated plate
    4. Uncoated plate

    Q.90 what is the use of T.L.C.

    1. To establish the purity and authenticity of starting material
    2. To monitor the reaction
    3. To check the isolation and purification procedures
    4. All of these

    Q.91 The energy absorbed in…………produces changes in rotational, vibrational, and electronic energy of the molecule

    1. U.V. region
    2. I.R. region
    3. NMR region
    4. Microwave region

    Q.92 what is the wave length of microwave that are used to produce electron spin resonance

    1. 10 nm-100 nm
    2. 100 nm-1000 nm
    3. 1 mm-30 cm
    4. 100 cm-500 cm

    Q.93 Ionic mobility is denoted by

    1. cm/sec
    2. Degree Celcius/sec
    3. mg/sec
    4. None of these

    Q.94 which is used for dispersing the incident radiation in UV spectroscopy?

    1. Nicol Prism
    2. Diffraction grating
    3. Both of these
    4. None of these

    Q.95 The Work of Heyrovsky is related to the discovery of ………technique for which he received the Noble prize in 1959.

    1. Potentiometry
    2. Polarimetry
    3. Polarography
    4. Amperometry

    Q.96 When the potential applied across two electrode is maintained at some constant value, the current is measures and plotted against the volume of the titrant is known as
  5. Potentiometry
  6. Conductometry
  7. Polarography
  9. Amperometry

Q.97 the substituent that delocalizes the pi electrons and enhances the fluorescence is

  1. -Cl
  2. -NO2
  3. -NH2
  4. –COOH

Q.98 which of these is not an emission spectroscopy

  1. Fluorimetry
  2. Fluorescence
  3. Phosphorescence
  4. Infrared

Q.99 which one is not used as oxidant in Flame emission spectroscopy?

  1. Air
  2. Nitrous oxide
  3. Hydrogen
  4. Oxygen

Q.100 The ratio of cell constant and resistance in Conductometric titration is known as

  1. EMF
  2. Specific conductance
  3. Standard potential
  4. None of these

Part - III

1. _________ is used as primary standard for standardization of NaOH.

  1. Sodium carbonate
  2. Sodium bicarbonate
  3. Sodium chloride
  4. Potassium dichromate

2. Phenolphthalein has a pH range of

  1. 6.8 – 8.4
  2. 1.2 – 2.8
  3. 8.3 – 11.0
  4. 4.2 – 6.3

3. Errors arise due to the individual analyst is responsible for them

  1. Method error
  2. Instrumental error
  3. Personal error
  4. Random error

4. Solution of known concentration

  1. Standard solution
  2. Concentration
  3. Solution
  4. Concentrated solution

5. Acid is a substance which dissociates in water to produce hydrogen ions

  1. Arrhenius theory
  2. Lewis theory
  3. Bronsted theory
  4. Lowry theory

6. The colour change is due to ionisation of the acid base indicators

  1. . Ostwald theory
  2. Chromophore theory
  3. Quinonoid theory
  4. Resonance theory

7. Substance that can be reversibly oxidized or reduced, having different distinct colour in the individual oxidized and reduced forms

  1. Redox indicators
  2. Redox potential
  3. Redox number
  4. Redox state

8. 20 gm NaOH in 500 ml =

  1. . 0.1 N
  2. 1 N
  3. 0.5 M
  4. 0.05 N

9. In oxidation reduction change in __________ of reacting element takes place.

  1. Volume
  2. pH
  3. Absorbance
  4. Valency

10. __________ is not an amphiprotic solvent.

  1. . Water
  2. Alcohol
  3. Acetic acid
  4. None

11. __________ is not type of co-precipitation.

  1. Surface adsorption
  2. Occlusion
  3. Crystallization
  4. Mechanical entrapment

12. Oxidation-Reduction titration is also known as

  1. Complexometric titration
  2. Gravimetric titration
  3. Redox titration
  4. Gasometric titration

13. Potentiometry is type of ________ method.

  1. Qualitative
  2. Chromatographic
  3. Classical
  4. Electro-chemical

14. ________ is chelating agent

  1. Salicylic acid
  2. EDTA
  3. Benzoic acid
  4. Glycerol

15. __________ used as titrant in non-aqueous titration.

  1. EDTA
  2. Perchloric acid
  3. Sodium nitrite
  4. Silver nitrite

16. Conductometry used for the measurement of

  1. Conductivity
  2. Potential
  3. Temperature
  4. Concentration

17. Standardization of Iodine is carried out using ________________

  1. Sodium thiosulphate
  2. Oxalic acid
  3. Perchloric acid
  4. None of these

18. The degree of agreement between measured value and accepted true value is _____________

  1. Precision
  2. Accuracy
  3. Range
  4. Average deviation

19. Behavior of indicator is explained by ___________ theory.

  1. Chromospheres
  2. Ionic
  3. Color
  4. Resonance

20. pH is defined as

  1. –log [OH–]
  2. –log [H+]
  3. pH + pOH
  4. log pOH

21. The titration carries out between KCl and AgNO3 is termed as_________titration.

  1. Oxidation-Reduction
  2. Precipitation
  3. Acid-Base
  4. None of these

22. 8.5 ml HCl in 1 litre = __________________

  1. 0.1 M
  2. 0.1 N
  3. Both A and B
  4. 0.5 M

23. The number of gm-equivalent of the solute per liter of solution is known as

  1. Normality
  2. Molarity
  3. Molality
  4. Mole fraction

24. The number of gm-mole of the solute per liter of solution is known as

  1. Normality
  2. Molarity
  3. Molality
  4. Mole fraction

25. The number of gm-mole of the solute per kg of solution is known as

  1. Normality
  2. Molarity
  3. Molality
  4. Mole fraction

26. The ratio of number of gm-mole of a component to total number of gm-mole in mixture or solution is known as

  1. Normality
  2. Molarity
  3. Molality
  4. Mole fraction

27. The number of gms of solute per 100 ml of solvent is known as

  1. Normality
  2. % weight by volume
  3. Molality
  4. Mole fraction

28. The chemical reagent from which solution of required concentration can be prepared is

  1. Secondary standard
  2. Dilute solution
  3. Concentrated solution
  4. Primary standard

29. In strong acid – strong base titration, the pH of mixture at initial stage is find out by formula

  1. PH=-log[H+]
  2. [H+]=NaVa-NbVb/(Va + V
  4. POH = -log[OH-l
  5. [OH-] = NbVb – NaVa/ (Va+ V

30. In Standard solution which of the following is accurately known ,

  1. Normality, strength or % of chemicals
  2. Volume
  3. Pressure
  4. Temperature

31. The process of adding known concentration until it complete the reaction with known volume is called as

  1. Titrant
  2. Analysis
  3. Titration
  4. Titrend

32. In titration end point can be determined by change in colour by

  1. Measuring cylinder
  2. Burette
  3. Instrument
  4. Indicator

33. The Quantity of chemical in each liter of solution is known as

  1. Normality
  2. Strength
  3. Molecular Weight
  4. Equivalence Weight

34. Exactly required concentration can be prepared from chemical reagent is called as

  1. Primary standard
  2. Secondary standard
  3. Both A & B
  4. None of this

35. An example of a primary standard substance is

  1. FeS04
  2. Na2C03
  3. NH40H
  4. NaOH

36. A normal solution is one which contains

  1. Gram molecular weight/L
  2. Gram equivalence weight/L
  3. Gram formula weight/L
  4. Gram molecular weight/Kg

37. A buffer solution can be formed by dissolving equal moles of

  1. HF and NaF
  2. HCl and NaOH
  3. KBr and Na3P04
  4. CH3COOH and NaCl

38. The conjugate acid of HAs042- is

  1. H3O*
  2. AS04’+
  3. H3ASO4
  4. H2ASO4*

39. Which of the following indicators has a transition point closest to the equivalence point for the titration of a weak acid by a strong base?

  1. Orange IV
  2. Tliymol blue
  3. Methyl orange
  4. Bromcresol green

40. A solution of known concentration is the definition of a

  1. Buffer solution.
  2. Neutral solution.
  3. Standard solution.
  4. Saturated solution.

41. Which of the following is the strongest Bronsted-Lowry base?

  1. NH3
  2. CO3 2+
  3. HSO3
  4. H2BO3

42. An Arrhenius acid is defined as a chemical species that

  1. is a proton donor.
  2. is a proton acceptor.
  3. Produces hydrogen ions in solution.
  4. Produces hydroxide ions in solution.

43. Consider the following reaction: H3BO3 (aq) + HS- (aq) →H2BO3- (aq) + H2S (aq) The order of Bronsted-Lowry acids and bases in this equation is

  1. Acid, base, base, add.
  2. Acid, base, acid, base.
  3. Base, acid, acid, base.
  4. Base, acid, base, acid.

44. Which of the following indicators is yellow at a pH of 10.0?

  1. Methyl red
  2. Phenol red
  3. Thymol blue
  4. Methyl violet

45. Which of the following is a general property of bases?

  1. Taste sour
  2. Turns litmus red
  3. Conduct electric current in solution
  4. Concentration of H3O+ is greater than concentration of OH-

46. The conjugate base of an acid is produced by

  1. Adding a proton to the acid.
  2. Adding an electron to the acid.
  3. Removing a proton from the acid.
  4. Removing an electron from the acid

47. A buffer solution may contain equal moles of

  1. Weak add and strong base.
  2. Strong acid and strong base.
  3. Weak acid and its conjugate base.
  4. Strong acid and its conjugate base.

48. Which of the following are general properties of bases in aqueous solution?

  1. Feel slippery and increase H3O+
  2. Turn litmus red and accept a proton
  3. Conduct electricity and turn littmus blue
  4. Feel slippery and react with Au to produce H2 (g)

49. Pure sodium hydrogen phthalate is used to standardize a solution of NaOH for acid-base titration. What term is used to describe the sodium hydrogen phthalate?

  1. Titrant base
  2. Standard buffer
  3. Equivalent base
  4. Primary standard

50. An Arrhenius base is defined as a compound that

  1. Accepts OH- in solution.
  2. Releases OH-in solution.
  3. Accepts protons in solution.
  4. Donates protons in solution.

51. A Bronsted-Lowry acid is defined as a substance that

  1. releases H+ (aq)
  2. releases OH-(aq)
  3. accepts proton in solution
  4. donates proton in solution

52. A basic solution can be defined as one in which

  1. [H3O+] is not present
  2. [H3O+] is equal to [OH-]
  3. [H3O+] is less than [OH:]
  4. [H3O+] is greater than [OH-]

53. A chemical indicator in solution consists of

  1. A weak acid and its conjugate acid.
  2. A weak acid and its conjugate base.
  3. A strong acid and its conjugate acid.
  4. A strong acid and its conjugate base.

54. What do a chemical indicator and a buffer solution typically both contain?

  1. A strong acid and its conjugate acid
  2. A strong acid and its conjugate base
  3. A weak acid and its conjugate acid.
  4. A weak acid and its conjugate base

55. When performing a titration experiment, the indicator must always have

  1. A distinct colour change at pH = 7.0.
  2. The ability to change from colourless to pink,
  3. A transition point that is close to the equivalence point.
  4. An equivalence point that is close to the stoichiometric point. …

56. Which of the following is not a good use for an acid-base titration curve?

  1. to determine the concentration of the base
  2. to select a suitable indicator for the titration
  3. to determine whether the acid is strong or weak
  4. to select a suitable primary standard for the titration

57. Which of the following acids has the weakest conjugate base?

  1. HIO3
  2. HNO2
  3. H3PO4
  4. CH3COOH

58. Which of the followiing 1.0 M salt solutions will be acidic?

  1. NaNO3
  2. NaHCO3
  3. NaHS04
  4. NaHPO4

59. The pH at which an indicator changes colour is known as its

  1. Standard point.
  2. Transition point.
  3. Equivalence point.
  4. Stoichiometric point.

60. A buffer solution can be prepared by dissolving equal moles of

  1. A weak base and a strong base.
  2. A weak acid and its conjugate base.
  3. A strong base and its conjugate acid.
  4. A strong acid and its conjugate base.

61. A Bronsted-Lowry acid is defined as a substance that

  1. releases
  2. releases OH (aq)
  3. accepts a proton
  4. donates a proton

62. A chemical indicator in solution consists of

  1. A weak acid and its conjugate acid.
  2. A weak acid and its conjugate base.
  3. A strong acid and its conjugate acid.
  4. A strong acid and its conjugate base.

63. Which is the conjugate base of H2PO4-?

  1. OH-
  2. PO4 3-
  3. HPO42-
  4. H3PO4

64. What do a chemical indicator and a buffer solution typically both contain?

  1. a strong acid and its conjugate acid
  2. a strong add and its conjugate base
  3. a weak add and its conjugate acid
  4. a weak add and its conjugate base

65. Non aqueous titration is carried out for

  1. Water insoluble drug
  2. Weakly acidic drug
  3. Weakly basic drug
  4. All the above

66. Which one is aprotic solvent?

  1. Chloroform
  2. Benzene
  3. Both
  4. None

67. Prototogenic solvent is

  1. Sulphuric acid
  2. Hydrochloric acid
  3. Nitric acid
  4. All the above

68. Protophilic solvent is

  1. Sodium hydroxide
  2. Lithium methoxide
  3. Sodium methoxide
  4. All

69. Which one is useful in non aqueous titration?

  1. Leveling solvent
  2. Differentiating solvent
  3. Both
  4. None

70. Water may interfere with non aqueous titration by

  1. Acting as Strong acid than the weakly acidic drug
  2. Acting as Strong base than the weakly basic drug
  3. Both
  4. None

71. In the preparation of the 0.1 (N) perchloric acid amotmt of acetic anhydride should be optimum. Why?

  1. If added more quantity then amine drug may acetylate and causes erroneous result
  2. If added less quantity then water may interfere with the titration,
  3. Formation of acetyl perchlorate can cause explosion
  4. All

72. Perchloric acid can be standardized by using

  1. Benzoic acid
  2. Oxalic acid
  3. Potassium hydrogen phthalate
  4. Tartaric add

73. Which one is used as indicator for non aqueous titration?

  1. Crystal violet
  2. Thymol blue
  3. Oracet blue B
  4. All

74. Potentiometric titration is used in nonaqueous titration, when

  1. Colour of the solution is high
  2. Colour of the solution is low
  3. Both
  4. None

75. Sodium Acetate, NaC2H302, is a water soluble salt that forms an aqueous solution that is

  1. Acidic
  2. Basic
  3. Neutral
  4. None of the above

76. All the compounds given can be assayed by NAT except

  1. Piperazine citrate
  2. Diethylcarbamazine
  3. Niclosamide
  4. Metrifonate

77. Example for amphiprotic solvent

  1. Methanol
  2. Glacial acetic add
  3. Water
  4. All of the above

78. Nature of amphiprotic solvent

    P) Acts as a base in strong addic environment
    Q) Acts as a acid in strong basic environment
    R) Acts as a base in weak basic environment
    S) Neutral in nature

  1. P,R
  2. P,S
  3. Q,R
  4. P,Q

79. Principle involved in non aqueous titration of weakly basic drug

  1. Proton donation from acetic acid to drug
  2. Proton donation from onium ion to acetic acid
  3. Proton donation from perchloric acid to acetic acid
  4. All of the above

80. AgCl has to be filtered off before titration using

  1. Modified Volhard’s method
  2. Mohr’s method
  3. Fajan’s method
  4. None of the above

81. The adsorption indicator in Fajan’s method has to be;

  1. Of the same charge as titrant
  2. Of the opposite charge as titrant
  3. Has no charge.

82. Titrations based on the use of silver nitrate are called

  1. Argentometric
  2. Complexometric
  3. Amperometric
  4. Conductometric

83. Adsorption indicators are used in

  1. Fajan’s method
  2. Mohr’s method
  3. Volhard’s method
  4. All

84. Which method follows the principle of formation of coloured precipitate at the end point?

  1. Fajan’s method
  2. Volhard’s method
  3. Modified Volhard’s metlrod
  4. All

85. In Which method, ferric ammonium sulphate is used as an indicator?

  1. Fajan s method
  2. Mohr’s method
  3. Volhard’s method
  4. None

86. Potassium chromate (K2CrO4) is used as an indicator in

  1. Mohr’s method
  2. Volhard’s method
  3. Fajan’s method
  4. None

87. Which of the following is an example of adsorption indicators?

  1. Eosin
  2. Phenolphthalein
  3. Methyl red
  4. Ninhydrin

88. Which method is used in water analysis

  1. Fajan’s method
  2. Mohr’s method
  3. Volhard’s method
  4. None

89. EDTA has_____binding sites and therefore it is also called as multidentate ligand.

  1. Six
  2. Five
  3. Four
  4. Seven

90. _______agent forms the complex with the metal ions that are not required in the estimation

  1. Masking
  2. Demasking
  3. Both

91. The endpoint for an EDTA titration is usually found by using a indicator

  1. Metallochromic
  2. Redox
  3. Acid base
  4. All

92. Which one is polydentale

  1. Ethylene diamine
  2. EDTA
  3. Both
  4. None

93. Which one is sequestering agent?

  1. Salicylaldoxime
  2. 8-hydroxy quinolilne
  3. EDTA
  4. All

94. The complexometric titration where EDTA is used carried out at basic pH. Why?

  1. For the stability of complex formed
  2. Reaction rate is optimum in basic pH
  3. There is less number of side reaction
  4. All

95. Which is used as masking agent for lead in complexometrric titration?

  1. Sod. Sulphide
  2. Oxalate
  3. Thiocetanaide
  4. All

96. Dimercaprol is used as complexing agent for complexion of

  1. Mercury
  2. Arsenic
  3. Lead
  4. All

97. Indicator used in complexometric titration is

  1. Erichrome black T
  2. E- Xylenolorange
  3. Mordant black II
  4. All

98. Name the assay method for the drud calcium gluconate

  1. Non aq titration
  2. Acid base titaration
  3. Complexometric
  4. lodometric

99. Number of rings observed in the tetravalent ion EDTA complex

  1. 4
  2. 5
  3. 6
  4. 3

100. Following are properties of good precipitate except:

  1. Easily filtered and washed free of contamination.
  2. Significant loss of the analyte occurs during filtration and washing.
  3. Unreactive with constituents of the atmosphere.
  4. both a and b

101. In ____________, analyte is separated from a solution of the sample as a precipitate and is converted into a compound of known composition

  1. Volatilization gravimetry
  2. Precipitation gravimetry
  3. Electrogravimetry
  4. Precipitation point

102. ___________is the weight of analyte per unit weight of the precipitate.

  1. Gravimetric factor
  2. Precipitation factor
  3. Electrogravimetry factor
  4. None of the above

103. Digestion of precipitate also known as

  1. Ageing
  2. Gravimetric factor
  3. Co – precipitation
  4. Ostwald ripening

104. SI unit of conductance is

  1. Mho
  2. Seimens
  3. Volt
  4. None of the above

105. Current used for measured of conductance is

  1. AC
  2. DC
  3. Both A and B
  4. None of these

106. Hydrogen and Hydroxyl ions are potent_____

  1. Conductivity
  2. Molar conductance
  3. Conductance Enhancers
  4. None of the above

107. _______is the product of specific conductance and volume of electrolyte

  1. Conductivity
  2. Molar conductance
  3. Conductance Enhancers
  4. None of the above

108. _____is the conductance offered by 1 cm^ of an electrolytic solution

  1. Molar conductjince
  2. Conductance Enhancers
  3. Specific conductance
  4. Specific Resistance

109. Potentiometry is an_____method of analysis

  1. Spectroscopic
  2. Electrometric
  3. Analytical
  4. None of the abobe

110. Example for reference electrode except

  1. Antimony electrode
  2. Silver-silver electrode
  3. Calomel electrode
  4. None of the above

111. The indicator used in estimation of hardness of water by potentiometiy

  1. PH
  2. PM
  3. Both a and b
  4. None of the above

112. Which of the following two are used reference electrodes in polentiometry?

P) Glass membrane Q) Hg-calomel R) Ag-silver chloride S) Ion selective

  1. P,Q
  2. P,S
  3. Q,R
  4. P,R

113. __________electrode is employed as a secondary reference electrode

  1. Hydrogen electrode
  2. Droping Mercury Electrode
  3. Calomel electrode
  4. None of the above

114. Each electrochemical cell is composed of

  1. Two half cells
  2. Half cells
  3. Both A and B
  4. None of the above

115. An electrode, whose electrode potential is well known and stable is a

  1. Indicator electrode
  2. Reference electrode
  3. Both A and B
  4. None of the above

116. In polarography, when limiting current is achieved, one of the following process takes place. Choose that.

  1. The rate of electron transfer just matches the rate of mass transfer
  2. The rate of electron transfer is slower than the rate of mass transfer
  3. The rate of electron transfer becomes independent of the rate of mass transfer
  4. The rate of electron transfer far exceeds the rate of mass transfer

117. Which of the following is used as indicator electrode in polarography?

  1. Glass
  2. Dropping mercury
  3. Platinum
  4. Silver

118. For Qualitative analysis by polarography, characteristic parameter used is

  1. Diffusion current
  2. Half wave potential
  3. Voltage
  4. None of the above

119. Limiting current is sum of diffusion current and

  1. Residual current
  2. Faradic current
  3. Migration current
  4. Additional current

120. Gradual rising in current in polarography is called

  1. Weak current
  2. Higher current
  3. Migration Currerrt
  4. Residual current

121. Reason for generation of migration current in polarogram is

  1. Migration and diffusion of charged particles
  2. Migration of charged particles
  3. Diffusion of charged particle
  4. None of the above

122. The D and L isomeric forms can be distinguished by

  1. Polarimetry
  2. Refractometry
  3. Potentiometry
  4. Conductometry

123. Sodium vapor lamp used in Polarlmeter emit light of wavelcngth (in Angstrom)

  1. 5890 & 5896
  2. 4368 & 4916
  3. C 5770 & 5791
  4. 5461 & 4368

124. Oxidation involves

  1. loss of hydrogen
  2. loss of oxygen
  3. gain in hydrogen
  4. gain in electrons

125. In a reaction between CuS04(aq) and Zi(aq)

  1. Zinc experiences an increase in the oxidation state
  2. undergoes oxidation
  3. Zinc undergoes oxidation
  4. all of these

126. Oxidizing agents

  1. are mostly non-metals
  2. are mostly metals
  3. decrease in oxidation state
  4. are mostly transition metals

127. Upon oxidation of acidified potassium manganate (VII), the puiple color of Manganese

  1. stays
  2. changes to pink
  3. becomes colorless
  4. becomes blue

128. Hydrogen acts as a reducing agent,

  1. by taking oxygen
  2. by giving electron
  3. by taking hydrogen
  4. Both A and B

129. Reduction involves

  1. loss of oxygen
  2. gain in hydrogen
  3. gain in oxygen
  4. loss of electrons

130. Oxidizing agents does not include

  1. potassium iodide
  2. potassium manganate
  3. potassium dichromate
  4. bromine solutions

131.Hydrogen electrode can be used as

  1. Indicator electrode
  2. Reference electrode
  3. Secondary reference electrode
  4. Both A and b

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