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Worksheetsspectroscopy
Total questions: 40
Worksheet time: 25mins
Vibrating diatomic molecule obeys
Hookes law
Law of motion
Law of conservation of energy
none
In vibrational spectroscopy v is called
vibrational quantum number
rotational quantum number
oscillation quantum number
none
2-butanol
H2, CH4, C2H6 and C6H6 exhibit which PMR spectra?
Singlet
Doublet
Triplet
Quintet
Which of the compound is taken as standard for recording chemical shift?
Dimethylsilane
Trimethylsilane
Tetramethylsilane
Methylsilane
How many NMR signals in propane is
4
3
2
1
Full form of NMR is
Nuclear Magnetic Reaction
Nuclear Magnetic Resonance
Nuclear Mass Reaction
Nuclear Mass Resonance
How many NMR signals would be given by the compound (CH3)2CHCH2CH3
1
2
3
4
Light acts like
a wave.
a particle.
Both a wave and a particle
neither a wave nor a particle.
Which of the following shift leads to the decreased intensity of absorption?
Hypochromic
Hyperchromic
Hypsochromic
Bathochromic
Which of the following is not an auxochrome group?
–OH
–SH
–OR
–O2
Increase in the intensity of absorp in UV-Visible spectrum is called
Hypsochromic
Bathochromic
Hyperchromic
Hypochromic
An absorption towards longer wavelength is called
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
An absorption towards shorter wavelength is called as
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
If two double bonds of a cyclic diene are present in the same ring, it is called ……. diene.
Homoannular
Heteroannular
Homocylic
Heterocyclic
Which one of the following has maximum value of lambda max
Acetone
Ethyl methyl ketone
Methyl vinyl ketone
Acetaldehyde
If a double bond is exocyclic to two rings, λ max increases by ………. nm
5
10
20
30
UV spectroscopy provides information about presence of ……..
Multiple bond
Extent of conjugation
Aromatic rings
All of the above
Basic λ max value or parent value for heteroannular diene is
253 nm
256 nm
213 nm
215 nm
For one extra double bond extending conjugation, the λ max value increases by ...
15 nm
30 nm
60 nm
90 nm
Basic λ max value for homoannular diene is..
256 nm
253 nm
215 nm
202 nm
H2, CH4, C2H6 and C6H6 exhibit which PMR spectra?
Singlet
Doublet
Triplet
Quintet
What is the number of vibrational degrees of freedom in H2O?
2
3
4
1
Radio waves are:
short wavelength electromagnetic waves.
short wavelength sound waves.
long wavelength electromagnetic waves.
long wavelength sound waves.
