VIBRATIONAL SPECTROSCOPY Flashcards

1
Q

Vibrational spectroscopy involves the transitions falling in the spectral range of ____________
a) 100-1000 cm-1
b) 300-3000 cm-1
c) 400-4000 cm-1
d) 500-5000 cm-1

A

c) 400-4000 cm-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the region of IR spectra appears between (1400-600) cm-1?
a) Functional group region
b) Fingerprint region
c) Low-frequency region
d) None of the mentioned

A

b) Fingerprint region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Select the correct statement from the following option.
a) Infrared spectra can identify the unknown materials
b) It can determine the amount of components in a mixture
c) It can also determine the quality of a sample
d) All of the mentioned

A

d) All of the mentioned

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the following molecule have infrared active vibrations?
a) NO
b) CH4
c) H2
d) All of the mentioned

A

a) NO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which of the following cannot show a vibrational absorption spectrum?
a) OCS
b) H2O
c) CO2
d) C H2 = C H2

A

d) C H2 = C H2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following is not a type of bending molecular vibration?
a) Twisting
b) Stretching
c) Wagging
d) Rocking

A

b) Stretching

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the absorption frequency(cm-1) of –C=N functional group?
a) 3610-3640
b) 1690-1760
c) 1180-1360
d) 2850-2960

A

c) 1180-1360

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Presence of a functional group in a compound can be established by using _____________
a) Chromatography
b) IR spectroscopy
c) Mass spectroscopy
d) X-ray diffraction

A

b) IR spectroscopy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Select the incorrect option from the following option.
a) IR spectroscopy helps in the determination of purity
b) IR spectroscopy helps in the determination of force constant from vibrational spectrum
c) IR spectroscopy helps in identifying an unknown compound
d) None of the mentioned

A

d) None of the mentioned

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

IR spectroscopy helps in detecting the presence of hydrogen bonding.
a) True
b) False

A

a) True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly