1. Which property of incident light is directly measured by spectrophotometry

a) Absorance

b) Transmitance

c) Reflection

d) Refraction

2. In IR spectroscopy intermolecular hydrogen bonding causes

a) Sharping of the peak

b) Broadening of the peak

c) Shifting of the peak

d) Doesnt causes any problem

3. The phenomenon in which substaqnces are excited electronically by the absorption of uv or visible radiation , emit light at a longer wavelength is called as

a) Emission

b) Luminescence

c) Photoemission

d) All of the above

4. In flame photometry, the most widely used standard is-

a) Sodium

b) Magnesium

c) Lithium

d) Calcium

5.Absorbance is

a) Reciprocal of logarithm of absorbance

b) Directly proportional to logarithm of absorbance

c) Reciprocal of logarithm of transmittance

d) Directly proportional to logarithm of transmittance

6. Infrared spectrum of the compound is same when they are-

a) Meso compound

b) Enantiomers

c) Diestereomers

d) Stereoisomers

7. According to Pauli exclusion principle, spins of two electrons in the same

orbital are-

a) Parallel to one another

b) Opposite to one another

c) Perpendicular to one another

d) Supporting to one another

8. Three prominent emission line emmited by by sodium metal are of wavelength-

a) 590 nm, 470 nm, 240 nm

b) 590 nm, 425 nm, 240 nm

c) 590 nm, 330 nm, 285 nm

d) 671 nm, 766 nm, 589 nm

9. % Transmittance is calculated by

a) % T = IT / IO X 100

b) % T = IA / IO X100

c) % T = IO/ IT X 100

c) % T = IO/ IA X 100

10. In IR spectrospecy, the absorbed energy brings about predominant charges in

the vibrational energy which depends on

a) Only masses of the atom present in the molecule

b) Only strength of the bonds

c) The arrangement of atoms within the molecule

d) All of the above

11.The type of fluroscence, in which the absorbed radiation is re-emitted without a change in the frequency is known as,

a) Molecular fluroscence

b) Simple fluroscence

c) Complex fluroscence

d) Resonance fluroscence

12.The analyte is used in the form of a solution in flame photometry because it should undergo-

a) Evaporation b) Condensation

c) Neutralization

d) Precipitation

13.The gravity produced by photographic means using laser is

a) Photographic gravity

b) Laser gravity

c) Holographic gravity

d) None of the above

14.Wagging is the type of

a) Assymetric vibration

b) Symmetric bending vibration

c) Bending vibration

d) Independent vibration

15.Basis of the flame photometry is

a) Absorbance

b) Transmittance

c) Emmision

d) Refraction

16.The wavelength where the angle of defraction is equal to the angle of specular reflection from the face of gravity groove is called as-

a) Defraction wavelength

b) Specular wavelength

c) Blazed wavelength

d) Reflection wavelength

17.The ordinary IR region is

a) 0.8 ( to 2.5 (b) 2.5 ( to 15 (c) 15 ( to 200 (d) 200 ( to 400 (18.Most important feature which affect flame photometry-

a) Pressure

b) Concentration

c) Tempreture

d) Wavelength

19.Auxochromic substitution of chromophone increases the intensity of

a) n - (* transition

b) ( - (* transition

c) n - (* transition

d) ( - (* transition

20.In IR spectroscopy fractional frequencies are generally influenced by

a) Fernil resonance

b) Electronic effect

c) Hydrogen bonding

d) All of the above

21.In flame photometry, atomizer is used to-

a) Introduce liquid sample into flame at stable and reproducible rate.

b) Convert molecule into atoms

c) Convert liquid to solid residue

d) Exite the atoms from ground state to exited state.

22.Intensity of transmitted energy decreases exponentially as the depth of the path length of the beam-

a. Decreases

b. Increases

c. No change

23. Absorptivity is termed molar absorptivity when the

concentration units are

a. Gram / mole

b. Moles / milliliters

c. Moles / liter

d. Liter / mole centimeter

24. Resolution of a monochromator is the ability to distinguish

a. As seprate entities adjescent spectral features.

b. Sepration of different colours

c. Dispersing characterstics

d. Sepration of uv lights and visible lights.

25. The region around 2300 nm shows peak for

a)C ( N

b)Atmospheric CO2

c)May be both

d)Something else

25. Unsaturated organic functional group that absorbed in uv-visible region is

known as -

a) Auxochrome

b) Chromophores

c) Bathochrome

d) Hypsochrome

26. Match the following pair of range A to D

1. Eosin a) 7.2 -9.0

2. 2- Napthaquinone b) 3.0 4.0

3. Hydroxyl annanic acid c) 5.2 6.6

4. Acidine d) 4.4 6.3

27. The carbonyl group shows the absorption in the region

a) 1550 - 1450 cm -1b) 1600 - 1800 cm -1c) 3500- 3600 cm -1d) 2900- 3000 cm -1 28. Extinction E =

a) log Io / Ic

b) log T

c) It / Ic

d) log Io 10 -et

29. In the IR spectroscopy primary, secondary, tertiary amines may be

distinguishes by-

a)Measuring the peak at 3200- 3400 cm-1 wavelength

b)pattern of peak at 3200- 3400 cm-1 c)By measuring the peak intensity at 3200 3400 cm-1 d)None of the above

30. If high atomic number atom is introduced into a electron system, it enhances,

a)Phosphorescence

b)Resonance fluorescence

c)Molecular fluorescence

d)Fluorescence

31.The sample system is maintained at liquid nitrogen temp in a-

a)UV visible analysis

b)Flurometric analysis

c)Phosphorimetric analysis

d)All of the above.

32.In uv visible region which electron does not show any absorption

a)

b)n

c)

d)n &

32. The sample system is maintained at liquid nitrogen temperature in..

a) UV visible analysis

b) Phosphometric analysis

c) Flurimetric analysis

d) All of the above

33. In UV visible region which elctron does not show any absorption..

a) sigma

b) n

c)

d) & n

34. In IR, compound give peak at 3200. 3400cm, 3000. 3100, 2950-1710cm, 1620-1500, the compound may be

a) Benzoic acid

b) p methyl Benz amide

c) Salicylic acid

d) p methyl benzoic acid.

35. Auxochromes

a) Increases intensity of light

b) modify & shift absorption band

c) Destabilizes the chromospheresd) does not show any effect.

36. For the determination of structure IR Spectroscopy is given_______preferance.

a) 10%

b) 50%

c) 20%

d) 40%

37. Absorption is calculated by..

a) Einsteins law

b) Beers law

c) Ostwalds law

d) Nernsts equation

38. For the preparation of pellet in IR generally the material used is

a) Calcium chloride

b) Calcium carbonate

c) Potassium bromide

d) Potassium carbonate.

39. Source of light for UV- spectroscopy is..

a) Tungstenb) Deuteriumc) Tritiumd) Sodium

40. UV absorption range is..

a) 300- 600 nm

b) 200- 400 nm

c) 200- 600 nm

d) 400- 600 nm

41. In IR spectroscopy ortho, para & meta substitution can be distinguished..

a) Statement is true

b) Statement is false

c) Statement is partially trued) Statement is partially false

42. the region of electromagnetic spectrum between 10nm- 200nm is known as..

a) Vaccum ultraviolet regionb) Microwave region

c) Far UV region

c) low UV region

43. The halogens can be identified effectively by..

a) UV spectroscopy

b) IR spectroscopy

c) Mass spectroscopy

d) NMR spectroscopy

44. Electron releasing group generally..

a) Increase frequency of absorption

b) Decrease frequency of absorption

c) Depends upon nature of compound

d) Do not affect the frequency of absorption

45. Beers law states that absorbance of a particular chemical species is directly proportional to..

a) Intensity of transmitted energy

b) Concentration of that particular species.

c) Depth of the path length

d) Thickness of the medium.

46. In IR, hydroxyl group stretching gives absorption band in the region..

a) 1000- 2000 cm-1

b) 2000- 3000 cm-1

c) 3000- 4000 cm-1

d) 4000-5000 cm-1 47. In spectroscopy R band spectra arises from..

a) - *b) n-

c) n- *d) - 48. Which of the following is vacuum UV- region

a) 380- 780nm

b) 200- 380 nm

c) 120- 180 nm

d) 2.5- 25

49. Bathochromic shift depends upon.

a) - *

b) 6- 6*

c) n- *d) n-6* 50. Nernsts Glower is a source of IR, light which may contain oxides of mixtures of..

a) Radium, yttrium & Erbium

b) Zirconium, yttrium & thorium

c) Erbium, zirconium & radiumd) Radium, Zirconium & thorium

51. Vacuum ultraviolet region is..

a) Below 150 m

b) Above 200m

c) Below 200 m

d) All of the above

52. Blue shift is

a) Absorption max. shifted towards longer wavelength.

b) Absorption max. shifted towards shorter wavelength

c) Intensity of absorption max. increases.

d) Intensity of absorption max. decreases

53. The decrease in the intensity of fluorescence with further increase in concentration of fluorogenic material is called..

a) True quenching

b) Intermolecular quenching

c) Self quenching

d) Intramolecular quenching

54.Deuterium discharge lamp is used as a source of radiation in the range from.

a) 100- 400 nm

b) 250 550 nm

c) 200- 380 nm

d) 350- 750 nm

55. In IR, the functional group region is important for..

a) Comparison of compounds containing some functional group.

b) Detection of functional group.

c) Confirmation of molecular structure.

d) Above all a), b) & c)

56. In atomic emission spectroscopy, the source of radiation is..

a) Xenon discharge lamp.

b) Flame

c) Hallow cathode lamp.

d) Mercury vapour lamp

57. The functional group capable of fluorescence is .

a) OH

b) NH-C-CH3

c) COOHd) NO

O

58. The radiation having only one particular wavelength is

a) Electromagnetic radiation

b UV radiation

c) IR radiation

d) Monochromatic radiation

59. In IR, aromatic stretching gives the appearance of bands in the region..

a) 3000 cm-1 3100 cm-1

b) 2900 cm-1 3000 cm-1

c) 3100 cm-1 3200 cm-1

d) 1430 cm-1 1550 cm-1

60. Ionization can be minimized by adding second ionizable element into the sample & standard which is called as..

a) Anti ionizing element

b) Spectrophotometric buffer

b) Radiation buffer

d) Co-element

61. The molecules in their ground state have two unpaired electrons is known as

a) Singlet state

b) Doublet state

c) Triplet state

d) Quintet state

62. Principle band spectrum for phenol is at 250 nm. What will the max of O-nitro phenol

a) 274 nmb) 279 nmc) 283 nmd) 290 nm

63. Color compounds absorb at the wavelength

a) 200 nmb) 300 nmc) 250 nmd) Above 400 nm

64. If a compounds absorbs around 225 nm, which will be the solvent of choice

a) Acetone

b) Ethyl acetate

c) Liquid paraffin

c) Methanol

65. Match the terms mentioned from A to D with the corresponding spectroscopic method

i) IR

A. Antibonding orbital

ii) UV

B. Emission

iii) Fluorometry

C. Metastable ion

iv) Mass spectra

D. Stretching & twisting

66.In Paracetmol, peak because of Phenolic group is around

a) 2250 cm-1 b) 2550 cm-1 c) 2950 cm-1 d) 3350 cm-1 67. Riboflavin is officially assayed by

a) UV- spectroscopy

b) Colorimetry

b) Flurimetry

d) Conductometry

68. A prominent peak around 1750 in IR indicate the presence of..

a) Aromatic nucleus

b) Carbonyl group

c) NH2- group

d) Aliphatic group

69. Match the following from A to D ( Emission Period)

i) Fluorescence

A. 1 to 10 days

ii) Phosphorescence

B. 10-4 to month

C. 10-8to 10-4sec.

D. 10-4to 10 sec

70. Match the following from A to D

I( Fuel & oxidant )

II ( temperature 0c)

i. Gas / Air

A. 3050 - 3150

ii Gas / O2

B. 2700 - 2800

iii H2 / Air

C. 1700 - 1900

iv C2H2 / O2

D. 2000 - 2100

E. 3800 - 3900

71. Select the appropriate colour for the given wavelength

i. 490 - 550 nm

A. Green

ii 550 - 560 nm

B. Yellow

iii 575 - 590 nm

C. Blue

iv 675 - 750 nm

D. Orange

E. Red

72. Match the following:

I (Metals) II (Color of emitted radiation)

i. Sodium

A. Yellow

ii. Potassium

B. Blue

iii. Calcium

C. Red

D. Green

73. Match the following:

i. Hyperchromic shift

A.To lower wavelength

ii. Bathochromic shift

B. Decrease absorptivity

iii. Hypochromic shift

C. To a higher wavelength

iv Hypsochromic shift

D. Increase absortivity

74. Match the following:

Group I (Atoms) Group II (Wavelength of emitted radiations)

i. Lithium

A. 671nm

ii Sodium

B. 590nm

iii Potassium

C. 760nm

iv. Calcium

D. 422nm

E. 280nm

75. which of the following shows absorption to larger wavelength

a) Aldehyde and ketone

b) Heterocyclic compounds

c) Aromatic compounds

d) Dienes and Polyenes

76. In absorption spectroscopy blue shift means:

a) Hyperchromic effect

b) Hypsochromic effect

c) Hypochromic effect

d) Bathochromic effect

77. Transition of electrons in their excited state gives the absorption bands as :

a) KLMN b) BEMN c) KLBR d) KRBE

78. Green color in absorption spectrum transmitted wavelength at

a) 560-575nm

b) 575-590nm

c) 450-480nm

d) 500-560nm

79. Far UV region exist at

a) 200-400nm

c) 4-180nm

b) 400-750nm

d) 100-200nm

80. Monochromator is an important part in

a) PH meter

b) IR double beam spectrophotometer

c) HPLC

d) polarograph

81. Stretching and bending is associated with:

a) NMR b) IR c) UV d) a and b both

82. IR is convenient method for understanding of :

a) Drug receptor interaction

b) Functional group identification

c) Physiochemical properties

d) None of above

83. Silicon carbide rod heated to high temp is used as:

a) Detector in IR b) Source in IR c) Source in fluorimetry d) None of above

84. Bolometer consists of

a) 2 semiconducting metal molded together

b) A thin blackened platinum strip in evacuated vessel

c) Tungusten wire

d) None of the above

85. Characteristic bands observed in IR spectrum of alcohol results from

a) -OH & - CO STRECHING b) -OH STRECHING

c) -CO STRECHING d) -CH STRECHING

86.IR Spectra appear as dip in the curve rather than maxima as in UV-Visible spectra because it is plot of

a) % Absorbance against wave no.

b) % Transmittance against concentration

c) % Absorbance against concentration

d) % Transmition against wave no.

87. OH bonding vibration for tert. Alcohol shows absorption in the region

a) 1030 cm-1 b) 1100 cm-1 c) 1200 cm-1 d) 1150 cm-1

88. A mixture of HCl and CH3COOH is successfully titrated by

a) Potentiometry b) Conductometry c) Amperometry d) Color reaction.

89. The conductivity of solution of an electrolyte is

a) Temperature dependent b) Temperature independent

c) Pressure dependent d) Heat dependent

90. In diazotization process electrodes are made up of

a) Glass b) Nickel-Chromium alloy c) Platinum d) Hydroquinon

91. Conductivity cell is made up of

a) Copper rod b) 2-parallel sheets of platinum c) Glass membrane with Ag/AgCl d) Glass-Calomel electrode

92. A linear molecule has possible fundamental vibrational modes

a) 3n-6 b)3n-5 c) 3n-2 d) None of above

93. A non-linear molecule has possible fundamental vibrational modes

a) 3n-6 b)3n-5 c) 3n-2 d) None of above

94. Non-fundamental bonds arise from harmonic overtones and the resulting wave number is equal to

a. Sum of two or more different wave number

b. Difference between two or more different wave number

c. Fractional multiples of fundamental wave numbers

d. All of the above

95. Sputtering processing occurs in

a) Flame photometry b) Spectroflurometry

c) Atomic absorption spectroscopy d) Colorimetry

96. Source of radiation used in AAS is

a) Flame b) Tungsten filament c) Toronto lamp d) Hallow cathode discharge lamp

97. Detector used in AAS is

a) Faraday cup detector b) Golay detector c) pH meter d) Photo multiplier tube

98. Which statement is correct for AAS

a. It is independent of flame temperature

b. It is depends upon flame temperature

c. It is done with spectrophotometer

d. No direct relationship between absorbance & concentration.

99. Resonance fluorescence is emitted when

a. Compound undergo resonance

b. When the wavelength of emitted radiation is less than wavelength of absorbed radiation

c. When the wavelength of emitted radiation is greater than wavelength of absorbed radiation

d. When the wavelength of emitted radiation is same to the wavelength of absorbed radiation

100. The word Strokes shift in Fluorimetry is attributed to

a. Shift of emission spectrum towards longer wavelength

b. Shift to emission spectrum at short wavelength

c. All above

d. None above