1. The possible transitions for water molecule in UV-visible region are
a. σ→σ *, n→π *
b. n → σ*
c. σ →σ *
d. n→π *, π→π *
Correct Option: b
2. The relative error is usually expressed as
a. parts per 10
b. parts per 100
c. parts per 20
d. none
Correct Option: d
3. The mid IR region is
a. 400-800 nm
b. 25 μm-2.5 μm
c. 2.5 μm – 1mm
d. 4000-400 cm-1
Correct Option: d
4. the term accuracy refers to how near the observed value is to
a. true value
b. mean value
c. low value
d. none
Correct Option: a
5. WHICH OF THE FOLLOWING IS USED AS EXCITATION SOURCE IN FLOURIMETEER
a. radio source
b. mercury vapour lamp
c. nerst vapour lamp
d. tungsten lamp
Correct Option: b
6. Dynodes are present in
a. Phototube
b. Diode array
c. Photomultiplier tube
d. Barrier layer detector
Correct Option: c
7. In phototube, photo multiplier tube, the transmitted light from the cells produces photocurrent by falling on
a. Metal junction
b. Metal layer
c. Photocathode
d. Photoanode
Correct Option: c
8. which of the following is not a component of AAS
a. monochromator
b. hollow cathode lamp
c. tungsten lamp
d. burner
Correct Option: c
9. which of the following elements are determined by flame photometry
a. li
b. na
c. k
d. all
Correct Option: d
10. most popular flame in AAS is
a. acetylene norous oxide
b. hydrogen-air
c. Acetylene-air
d. acetylene-O2
Correct Option: c
11. which has flame as source of excitational energy
a. UV-VISIBLE
b. flame photometry
c. IR
d. NMR
Correct Option: b
12. How accuracy is generall expressed
a. precision
b. errors
c. both have equal
d. none
Correct Option: a
13. 1% w/w soln contain solute
a. 1gm
b. 99gm
c. 10gm
d. none
Correct Option: a
14. for the preparation of 0.1 molar NaOH we required
a. 4gm NaOH
b. 40gm NaOH
c. 400gmNaOH
d. none
Correct Option: a
15. give molarity of 4g NaOH dissolved per 100cm3
a. 0.5
b. 1
c. 0.2
d. 0.1
Correct Option: b
16. limitation of distribution law is
a. SOLUTION SHOULD BE DILUTE
b. SOLVENTS SHOULD BE IMMISIBLE
c. molecular state of solute should be same
d. all
Correct Option: a
17. Which is the following technique is based on the absorption of light
a. atomic absorption
b. Uv visible
c. spectrophotometry
d. all
Correct Option: d
18. who discovered chromatography
a. HENRY
b. lard
c. tswett
d. curie
Correct Option: c
19. the mobile phase is
a. eluent
b. elution
c. eluate
d. none
Correct Option: a
20. WHICH OF The following radiations are weakest in energy?
a. visible
b. microwave
c. X rays
d. UV
Correct Option: b
21. Which of the following color has highest energy?
a. red
b. blue
c. green
d. violet
Correct Option: d
22. IR Spectroscopy provide s information about
a. molecular weight
b. alkyl group
c. conjugation
d. functional group
Correct Option: d
23. unit of Rf vakue is
a. no unit
b. mol/dm3
c. mol/cm3
d. bothband c
Correct Option: a
24. solvent used for the sepration of sugars in paper chromatography
a. ratio of all
b. ethylacetate
c. pyridine
d. water
Correct Option: b
25. Which radiations are due to vibrational changes?
a. UV
b. microwave
c. IR
d. visible
Correct Option: c
26. locating reagent for metals is
a. SILVER NITRATE
b. rubeanic acid
c. ninhydri
d. ISATIIN
Correct Option: b
27. Which of the following spectroscopic region is just above the region in which we see?
a. microwave
b. laser
c. IR
d. visible
Correct Option: c
28. The possible transitions for water molecule in UV-visible region are
a. n → σ*
b. σ→σ *, n→π *
c. σ →σ *
d. both a and d
Correct Option: a
29. The wavenumber of a transition is 2000 per centimeter.in what part of the EMR spec does this come
a. VISIBLE
b. NMR
c. IR
d. UV
Correct Option: c
30. The light source in visible spectrophotometer is
a. deuterium discharge lamp
b. mercury lamp
c. tungsten lamp
d. hydrogen gas lamp
Correct Option: c
31. Which of the following molecules will not show infrared spectrum?
a. HBr
b. HI
c. H2
d. HCL
Correct Option: c
32. Single band near 3000 per centimeter is a specific band for the identification of
a. alkenes
b. alkanes
c. alcohols
d. amines
Correct Option: a
33. What is the number of vibrational degrees of freedom in C6H5CH3?
a. 6
b. 8
c. 10
d. 40
Correct Option: d
34. On which factors the vibrational stretching frequency of diatomic molecule depend?
a. FORCE CONSTANT
b. COUPLING CONSTANT
c. spin state
d. all
Correct Option: a
35. Cut off wave length is the wavelength
a. Below which a solvent absorbs too much radiation
b. Above which solvent absorbs to much radiation
c. Below which analyte absorbs too much radiation
d. all
Correct Option: a
36. Absorption spectra is a plot of
a. % T Vs Concentration
b. Absorbance Vs Concentration
c. % T Vs Wavelength
d. Absorbance Vs wavelength
Correct Option: d
37. Maximum value of absorbance is
a. 0 to 2
b. 0 to 1
c. 0 to 0.5
d. all
Correct Option: a
38. Which cell is used in both UV and visible region?
a. quartz
b. glass
c. fused silica
d. none
Correct Option: a
39. The base value of a hetroannunular diene is
a. 253 nm
b. 214 nm
c. 300 nm
d. 217 nm
Correct Option: d
40. The increment for a single alkyl substituent is
a. 8
b. 10
c. 15
d. 5
Correct Option: d
41. The mid IR region is
a. 400-8000/cm
b. 400-800/cm
c. 400-1600/cm
d. 400-400/cm
Correct Option: d
42. WHICH SOLVENTS ARE USED IN UV- VISUBLE SPECTROSCOPy
a. ethanol c
b. n hexane
c. water
d. all
Correct Option: d
43. Benzene absorbs at
a. 204 nm
b. 254 nm
c. 184nm
d. all
Correct Option: d
44. Which of the following absorbs at more wavelength
a. aniline
b. benzene
c. PHENOL
d. ALL HAVE EQUAL ABSORPTION
Correct Option: a
45. All of the following are useful as a source for UV-Visible, EXCEPT
a. hydrogen lamp
b. deutrium lamp
c. GLOBAR
d. tungsten lamp
Correct Option: c
46. which has strogest energy
a. radiowaves
b. gammma rays
c. x-rays
d. IR
Correct Option: b
47. WHICH gas is used as mobile phase in GC
a. CO2
b. CH4
c. H2
d. CL2
Correct Option: c
48. which one gives better resolution
a. both have equal
b. chooper
c. grating
d. prism
Correct Option: c
49. how many elements are discovered by AAS
a. 62
b. 10
c. 20
d. none
Correct Option: a
50. WHICH ONE IS not a type of chromatography
a. TLC
b. HPLC
c. MASS
d. GC
Correct Option: c
