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Worksheetsunit 5 spectroscopy technique
Total questions: 16
Worksheet time: 16mins
The electric and magnetic field of an electromagnetic wave are
in opposite phase and perpendicular to each other
in opposite phase and parallel to each other
in phase and perpendicular to each other
in phase and parallel to each other.
Select the wavelength range corresponding to UV-visible region
400-800 nm
200-800 nm
25 μm-2.5 μm
2.5 μm – 1mm
The types of transitions possible in UV-visible region for a compound with molecular formula C 2H 4O are
P,Q,R
Q,R
P,S
P,Q,R,S
The possible transitions for water molecule in UV-visible region are
σ →σ *
n→π *, π→π *
σ→σ *, n→π *
n → σ*
Electronic transition possible for methane CH4
σ →σ *
π→π *
n → σ*
n→π *
Increasing order of wavelength is
X-ray, UV, IR, Microwave
Microwave, IR, UV, X-ray
UV, IR, X-ray, Microwave
Microwave, UV, IR, X-ray
The value to TMS proton in 𝛿 scale is
10
0
not predictable
-10
The fingerprint region in IR spectra ranges from
1500-700 cm-1
2260-2190 cm-1
1950-1550 cm-1
none of the above
Radiation source for visible spectrophotometer is
Tungsten filament lamp
Nersut glower
xenon discharge lamp
heated nichrome wire
In NMR spectroscopy, the radiation used for nuclear excitation is
Microwaves
IR
Radio waves
UV
Which of the following molecules will not give rotational spectra
CO
HCl
HBr
N2
The energy region of NMR spectroscopy is
400 MHz-900MHz
4-900 MHz
100-900MHz
300-800 MHz
light velocity
3x108 cm/sec
3x108mt/sec
3x108cm/sec2
3x108mt/sce2
Which of the following spectroscopy techniques is associated with molecular emission?
UV-Visible spectroscopy
IR spectroscopy
Fluorescence spectroscopy
X-ray diffraction
Which of the following statements regarding IR spectroscopy is correct?
IR radiation is higher in energy than UV radiation
IR spectra records the scattering of the radiation
IR spectra gives information about the ƛmax of the molecule
IR radiation is higher in wavelength than UV radiation
What do u mean that Spectroscopy
the study Interaction of matter with light
the study Interaction of nucleus with light
the study Interaction of electrons with light
the study Interaction of body with EMR
