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spectroscopy

Total questions: 40

Worksheet time: 25mins

Name
Class
Date
1.
______________ is the energy that can travel through space in the form of waves. 
a)
telescopes
b)
electromagnetic spectrum
c)
observatory
2.
Which of the following type of electromagnetic radiation has the most energy
a)
infrared
b)
ultraviolet
c)
microwaves
d)
radiowaves
3.
Put the visible light colors in order from longest wavelength to shortest wavelength
a)
Violet, Indigo, Blue, Green, Orange, Yellow, Red
b)
Red, Yellow, Green, Orange, Violet, Blue, Indigo
c)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
4.
The _______________ determines the color of visible light. 
a)
wavelength
b)
speed
c)
amplitude
d)
light
5.
The independent variable on an IR spectra is 
a)
wave length 
b)
wave number
c)
frequency squared
d)
transmission
6.
What part of the atom or molecule does infrared radiation affect
a)
the nucleus
b)
the electrons
c)
the  bonds
d)
the charge
7.
The dependent variable on an IR spectra is 
a)
wave length 
b)
wave number
c)
frequency
d)
transmission
8.

Vibrating diatomic molecule obeys

a)

Hookes law

b)

Law of motion

c)

Law of conservation of energy

d)

none

9.

In vibrational spectroscopy v is called

a)

vibrational quantum number

b)

rotational quantum number

c)

oscillation quantum number

d)

none

10.
The number of peaks in 1H NMR  for CH3 CH2 CH3 is
a)
0
b)
1
c)
2
d)
3
11.
The splitting pattern for the Hydrogen on the middle carbon in high resolution 1H NMR  for CH3 CH2 CH3 is
a)
a sextet
b)
a heptet
c)
a triplet
d)
a quartet
12.
Which of the following would be different  for 1-butanol and
 2-butanol
a)
The number of peaks on low res H NMR
b)
the molar mas
c)
the number of peaks in C NMR
d)
the finger print region of the infrared spectrum
13.

H2, CH4, C2H6 and C6H6 exhibit which PMR spectra?

a)

Singlet

b)

Doublet

c)

Triplet

d)

Quintet

14.

Which of the compound is taken as standard for recording chemical shift?

a)

Dimethylsilane

b)

Trimethylsilane

c)

Tetramethylsilane

d)

Methylsilane

15.

How many NMR signals in propane is

a)

4

b)

3

c)

2

d)

1

16.

Full form of NMR is

a)

Nuclear Magnetic Reaction

b)

Nuclear Magnetic Resonance

c)

Nuclear Mass Reaction

d)

Nuclear Mass Resonance

17.

How many NMR signals would be given by the compound (CH3)2CHCH2CH3

a)

1

b)

2

c)

3

d)

4

18.

Light acts like

a)

a wave.

b)

a particle.

c)

Both a wave and a particle

d)

neither a wave nor a particle.

19.
A molecule has a band at 3500cm-1 and sharp band at 1711cm-1. the molecule is most likely an
a)
amide
b)
ester
c)
alkanol
d)
carboxylic acid
20.
 molecule than has a broard band at 3400 cm-1 and no sharp peak at around 1680 cm-1
a)
amide
b)
ester
c)
alkanol
d)
carboxylic acid
21.
A molecule has a broadband at 3200cm-1 and sharp band at 1711cm-1. the molecule is most likely an
a)
amide
b)
ester
c)
alkanol
d)
carboxylic acid
22.

Which of the following shift leads to the decreased intensity of absorption?

a)

Hypochromic

b)

Hyperchromic

c)

Hypsochromic

d)

Bathochromic

23.

Which of the following is not an auxochrome group?

a)

–OH

b)

–SH

c)

–OR

d)

–O2

24.

Increase in the intensity of absorp in UV-Visible spectrum is called

a)

Hypsochromic

b)

Bathochromic

c)

Hyperchromic

d)

Hypochromic

25.

An absorption towards longer wavelength is called

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

26.

An absorption towards shorter wavelength is called as

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

27.

If two double bonds of a cyclic diene are present in the same ring, it is called ……. diene.

a)

Homoannular

b)

Heteroannular

c)

Homocylic

d)

Heterocyclic

28.

Which one of the following has maximum value of lambda max

a)

Acetone

b)

Ethyl methyl ketone

c)

Methyl vinyl ketone

d)

Acetaldehyde

29.

If a double bond is exocyclic to two rings,  λ\lambda max increases by ………. nm

a)

5

b)

10

c)

20

d)

30

30.

UV spectroscopy provides information about presence of ……..

a)

Multiple bond

b)

Extent of conjugation

c)

Aromatic rings

d)

All of the above

31.

Basic  λ\lambda  max value or parent value for heteroannular diene is

a)

253 nm

b)

256 nm

c)

213 nm

d)

215 nm

32.

For one extra double bond extending conjugation, the  λ\lambda  max value increases by ...

a)

15 nm 

b)

30 nm

c)

60 nm

d)

90 nm

33.

Basic  λ\lambda  max value for homoannular diene is..

a)

256 nm

b)

253 nm

c)

215 nm 

d)

202 nm 

34.

H2, CH4, C2H6 and C6H6 exhibit which PMR spectra?

a)

Singlet

b)

Doublet

c)

Triplet

d)

Quintet

35.
How many different H environment for molecule shown?
a)
4 Hydrogen environment, in (1.1.3.3) ratio
b)
4 Hydrogen environment, in (1.1.3.6) ratio
c)
3 Hydrogen environment, in (1.1.6) ratio
d)
3 Hydrogen environment, in (1.1.3) ratio
36.
Which of the following type of electromagnetic radiation affects the bonds,vibrating ,stretching rocking...
a)
infrared
b)
ultraviolet
c)
microwaves
d)
radiowaves
37.
Which of the following type of electromagnetic radiation affects spin of the nucleons
a)
infrared
b)
ultraviolet
c)
microwaves
d)
radiowaves
38.
NMR is used to determine
a)
the function groups present in inorganic molecules
b)
the molar mass of the compound
c)
the structure of the molecule
d)
the number of different carbon or hydrogen enviroments in the molecule
39.

What is the number of vibrational degrees of freedom in H2O?

a)

2

b)

3

c)

4

d)

1

40.

Radio waves are:

a)

short wavelength electromagnetic waves.

b)

short wavelength sound waves.

c)

long wavelength electromagnetic waves.

d)

long wavelength sound waves.