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PES spectroscopy

Total questions: 96

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

How many peaks would be expected for a PES spectum for Calcium?

a)

2

b)

3

c)

4

d)

5

2.

Which of these elements would have the same number of PES peaks as Fluorine?

a)

Neon

b)

Beryllium

c)

Sodium

d)

Chlorine

3.

Which of these elements would have the same number of PES peaks as Fluorine?

a)

Neon

b)

Beryllium

c)

Sodium

d)

Chlorine

4.

The PES spectrum below is for the element _______________.

a)

O

b)

Ne

c)

N

d)

F

5.

Examine the spectrum below. Where would you expect the 2p peak for F be if it were on the same spectrum?

a)

To the left of the peak at 3.04

b)

To the right of the peak at 3.04

c)

To the left of the peak at 1.31

d)

To the right of the peak at 1.31

6.

Which peak (or peaks) correspond to the valence electrons?

a)

The peak at 1

b)

The peaks at 1 and 2.05

c)

The peak at 239

d)

The peaks at 239 and 22.7

7.

Identify the Electron Configuration for Aluminum (Al)

a)

1s2 2s2 2p6 3s2 3p1

b)

1s2 2s2 2p6 3s2 3p3

c)

1s2 2s2 2p6 3s2 4p1

8.
As you move down the periodic table atoms get bigger.  This is because ____________.
a)
The atoms have more mass.
b)
The atoms have more protons.
c)
The atoms have more energy levels
d)
The atoms have more nuetrons
9.
List the following in order of weakest to strongest ionization energy.
P, Cs, Co, Sr
a)
P, Co, Sr, Cs
b)
Cs, Sr, Co, P
c)
Sr, Cs, Co, P
d)
P, Co, Cs, Sr
10.

Which of the following elements has the smallest atomic radius?

a)

Sulfur

b)

Chlorine

c)

Aluminum

d)

Sodium

11.

Which atom has the largest atomic radius?

a)

potassium

b)

rubidium

c)

francium

d)

cesium

12.
Atomic radius generally increases as we move __________.  
a)
down a group and from right to left across a period 
b)
up a group and from left to right across a period 
c)
down a group and from left to right across a period 
d)
up a group and from right to left across a period 
13.
Ionization energy is...
a)
the energy required to add an electron to a specific atom
b)
how much energy it takes to remove an electron from an atom
c)
the energy required to shield the outer electrons from the nucleus
d)
a measure of the ability of an atom to attract electrons
14.

Which has the SMALLER radius?

a)

Mg 2+

b)

S 2-

15.

Which atom has the LOWER ionization energy?

a)

Al

b)

Cl

16.

Vibrating diatomic molecule obeys

a)

Hookes law

b)

Law of motion

c)

Law of conservation of energy

d)

none

17.

Q Branch

a)

DJ=0

b)

DJ = ±1

c)

DJ=-1

d)

DJ =1

18.

P Branch

a)

DJ=0

b)

DJ=1

c)

DJ=-1

d)

DJ=±1

19.

R Branch

a)

DJ = ±1

b)

DJ = 0

c)

DJ = +1

d)

DJ = -1

20.

BAND CENTER OCCURS AT

a)

⍵

b)

⍵eXe

c)

⍵osc

d)

⍵0

21.

Zero point energy of S.H.O is

a)

⍵osc

b)

⍵e

c)

1/2 ⍵osc

d)

ALL

22.

Hertz can be converted cm-1 dividing by

a)

hc

b)

h

c)

h/n

d)

h/⍵

23.

Selection rule for SHO is

a)

Dv =0

b)

Dv =0,±1

c)

Dv =±1

d)

none

24.

Selection rule for anharmonic oscillator

a)

Dv =±1

b)

Dv =0,±1

c)

Dv =±1,±2,±3

d)

none

25.

MOARSE CURVE IS THE PLOT OF

a)

ENERGY VERSUS BONDLENGTH

b)

ENERGY VERSUS BOND DISSOCIATION ENERGY

c)

ENERGY VERSUS INTERNUCLEAR DISTANCE

d)

DISSOCIATION ENERGY VERSUS INTERNUCLEAR DISTANCE

26.

First overtone occurs at

a)

⍵e(1-4Xe)

b)

⍵e(1-3Xe)

c)

2⍵e(1-3Xe)

d)

⍵e(1-Xe)

27.

Xe is called

a)

Rotational constant

b)

Anharmonicity constant

c)

Oscillation frequency

d)

Wavenumber

28.

HOT BANDS OCCURS AT

a)

⍵e(1-4Xe)

b)

⍵e(1-2Xe)

c)

⍵e(1-3Xe)

d)

2⍵e(1-2Xe)

29.

DJ = -2

a)

Q BRANCH

b)

S BRANCH

c)

P BRANCH

d)

O BRANCH

30.

HOT BANDS OCCUR AT

a)

HIGH TEMPERATURE

b)

LOW TEMPERATURE

c)

HIGH INTENSITY

d)

LOW INTENSITY

31.

IN ALL BRANCHES OF SPECTROSCOPY THE UPPER LEVEL IS REPRESENTED BY

a)

SINGLE PRIME

b)

DOUBLE PRIME

c)

ZERO

d)

NONE

32.

In S.H.O Oscillator, the energy levels are

a)

EQUALLY SPACED

b)

INCREASING SPACING

c)

DECREASING SPACING

d)

NONE

33.

Fundamental vibration occurs at

a)

⍵e(1-Xe)

b)

⍵e(1-2Xe)

c)

2⍵e(1-2Xe)

d)

⍵e(1-3Xe)

34.

In vibrational spectroscopy v is called

a)

vibrational quantum number

b)

rotational quantum number

c)

oscillation quantum number

d)

none

35.

Condition for the molecule to be vibrational active

a)

permanent dipole moment

b)

change in dipolemoment

c)

change in polarisibility of the molecule

d)

All

36.

Homonuclear diatomic molecules with no permanent dipole moment show

a)

Vibrational spectroscopy

b)

Rotational spectroscopy

c)

Electronic spectroscopy

d)

NMR

37.

In vibrational analaysis of a band system the energy of the v=--- level is taken as zero

a)

0

b)

1

c)

2

d)

3

38.

In V" progression

a)

V' varies & v" is constant

b)

V" varies & v' is constant

c)

Both varies

d)

None of these

39.

A straight line representing a transition between electronic states will be

a)

Inclined with x axis

b)

Inclined with Y axis

c)

Horizontal

d)

Vertical

40.

Which of the following molecules is NMR active

a)

Helium

b)

Carbon

c)

Boron

d)

Oxygen

41.

The type of relaxation in NOE is

a)

Spin spin

b)

Spin Lattice

c)

Dipole Dipole

d)

Can't b predicted

42.

In general Chemical shift is measured in

a)

Ppm

b)

Ppb

c)

Ppt

d)

Cm-1

43.

The intensity ratio of the line CHO in CH3-CHO in NMR is

a)

1:1

b)

1:2:1

c)

1:3:3:1

d)

1:3:1

44.

The frequency in ESR falls in

a)

Gamma ray region

b)

Microwave

c)

RF

d)

IR

45.

The hyperfine structure in ESR is due to

a)

Nuclear spin -spin coupling

b)

Electron spin-spin coupling

c)

Both a and b

d)

Nuclear spin with electronic spi

46.

The electronic spectra in the visible range span is __________

a)

25000-72000 cm-1

b)

25000-50000 cm-1

c)

12500-25000 cm-1

d)

15000-30000 cm-1

47.

Which of the following transitions are of weak intensities and lie in the visible region?

a)

n→π*

b)

σ→σ*

c)

π→π*

d)

n→σ*

48.

Which of the following transitions are of weak intensities and lie in the visible region?

a)

n→π*

b)

σ→σ*

c)

π→π*

d)

n→σ*

49.

Which of the following transitions are of weak intensities and lie in the visible region?

a)

n→π*

b)

σ→σ*

c)

π→π*

d)

n→σ*

50.

Arrange the various electronic transitions in the order of increasing energy.

a)

n→σ* < π→π* < n→π* < σ→σ*

b)

n→π* < π→π* < n→σ* < σ→σ*

c)

n→σ* < n→π* < π→π* < σ→σ*

d)

σ→σ* < π→π* < n→π* < n→σ*

51.

Which of the following is not an auxochrome group?

a)

–OH

b)

–SH

c)

–OR

d)

–O2

52.

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

a)

Hypochromic

b)

Hyperchromic

c)

Hypsochromic

d)

Bathochromic

53.

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

a)

Hypsochromic

b)

Bathochromic

c)

Hyperchromic

d)

Hypochromic

54.

An absorption towards longer wavelength is called

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

55.

An absorption towards shorter wavelength is called as

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

56.

Methane molecule show ------- electronic transition

a)

σ→σ*

b)

π→π*

c)

n→π*

d)

n→σ*

57.

In hyperchromic shift, extinction coefficient is

a)

Small

b)

Large

c)

No change

d)

None of the above

58.

The different types of energies associated with a molecule are __________

a)

Vibrational energy

b)

electronic energy

c)

Rotational energy

d)

All of these

59.

Molecules which are having _______ are microwave active.

a)

Dipole moment

b)

High pressure Detector

c)

Principle axis

d)

Acidity

60.

A photon of wave number 100 cm-1 has a wavelength of

a)

1 m

b)

1 mm

c)

1000 nm

d)

100 m

61.

The photon described in Question 3 lies within which part of the electromagnetic spectrum?

a)

Radio wave

b)

Visible

c)

Infrared

d)

Ultraviolet

62.

The energy in joules of a photon of wavelength 355 nm is

a)

5.596 x 1019 J

b)

5.596 x 1028 J

63.

Calculate the moment of inertia, I, of the molecule 1H35Cl. The masses of the two atoms are mH = 1.673 x 1027 kg and mCl = 5.807 x 1026 kg. The equilibrium bond length of the molecule is 1.275 Å.

a)

2.644 x 1047 kg m2

b)

2.644 x 1027 kg m2

c)

2.644 x 1044 kg m2

d)

2.644 x 1024 kg m2

64.

Which of the following molecule has no rotational spectrum?

a)

NH3

b)

HCl

c)

N2

d)

H2O.

65.

The microwave active molecules are

a)

HCl, OCS

b)

CO,CO2

c)

Both a) and b)

d)

None of the above

66.

From the rotational microwave spectrum of 1H35Cl, we find that B = 10.59342 cm-1 . Given that the masses of 1H and 35 Cl are 1.0078250 and 34.9688527 amu, respectively, determine the bond length of the 1H35Cl molecule

a)

1.274 x 10-10 m

b)

1.674 x 10-10 m

c)

1.474 x 10-10 m

d)

1.0274 x 10-10 m

67.

The correct order of different types of energies is __________

a)

Eel >> Evib >> Erot

b)

Eel >> Erot >> Evib

c)

Evib >> Eel >> E rot

d)

None of these

68.

CONDITION FOR THE MOLECULE TO BE MICROWAVE ACTIVE

a)

CHANGE IN DIPOLEMOMENT

b)

CHANGE IN POLARSIBILITY

c)

PERMANENT DIPOLE MOMENT

d)

ALL

69.

Which of the following type of electromagnetic radiation has the most energy

a)

infrared

b)

ultraviolet

c)

microwaves

d)

radiowaves

70.

Which of the following molecules show microwave activity?

a)

H2

b)

CO2

c)

SF6

d)

CH3Cl

71.

The rotational energy of a diatomic molecule in terms of wave number is

a)

EJ = h28π2IJ(J+1)E_J\ =\ \frac{h^2}{8\pi^2I}J\left(J+1\right)

b)

EJ = h8π2ICJ(J+1)E_J\ =\ \frac{h}{8\pi^2IC}J\left(J+1\right)

c)

EJ = h28π2ICJ(J+1)E_J\ =\ \frac{h^2}{8\pi^2IC}J\left(J+1\right)

d)

EJ =h28π2I J(J+2)E_J\ =\frac{h^2}{8\pi^2I}\ J\left(J+2\right)

72.

The wave number difference between successive rotational levels of a rigid diatomic molecule is

a)

2B J

b)

BJ(J+1)

c)

2BJ(J+1)

d)

2BJ(J-1)

73.

The various energy level of a rotational spectrum is given by

a)

2B,6B,12B,_ _ _

b)

2B,4B,6B,8B,….

c)

0,2B,6B,12B,_ _ _

d)

0,2B,4B,6B,8B,….

74.

The different types of energies associated with a molecule are __________

a)

Vibrational energy

b)

electronic energy

c)

Rotational energy

d)

All of these

75.

Molecules which are having _______ are microwave active.

a)

Dipole moment

b)

High pressure Detector

c)

Principle axis

d)

Acidity

76.

The correct order of different types of energies is __________

a)

Eel >> Evib >> Erot

b)

Eel >> Erot >> Evib

c)

Evib >> Eel >> E rot

d)

None of these

77.

The arrangement of various type of Electromagnetic radiation in the order of their

a)

wavelength,frequency

b)

Energy,velocity

c)

Speed,Rate

d)

None

78.

Joules can be converted to cm-1

a)

Multiply by h

b)

Multiply by hc

c)

Divide by h

d)

Divide by hc

79.

Rotational spectrum is useful to determine the

(a)  

80.

Intensity of spectral lines depends on

a)

energy of the energy level

b)

population of the energy level

c)

J value

d)

B Value

81.

Plot of NJ/N0against J gives

a)

Boltzmann curve

b)

Gaussian curve

c)

Parabola curve

d)

Morse curve

82.

The molecule which is microwave active

a)

H2

b)

O2

c)

HCl

d)

co2

83.

The wavelength range of rotational spectrum is

a)

10-2 to 10cm

b)

1 to 10cm

c)

10 to 100 cm

d)

1 to 1000cm

84.

As J value increases, the energy of the energy level

a)

Increases

b)

Decreases

c)

Remains same

d)

Remains constant

85.

Selection rule of rotational spectrum

a)

,Dn=±1

b)

DS=0

c)

,DJ=±1

d)

,DJ=0

86.

The rotational spectrum consits of a series of lines at

a)

2B

b)

B

c)

4B

d)

6B

87.

Bond length can be determined using

a)

Moment of inertia

b)

Energy

c)

Angular momentum

d)

Plancks constant

88.

How many peaks would be expected for a PES spectum for Calcium?

a)

2

b)

3

c)

4

d)

5

89.

Which of these elements would have the same number of PES peaks as Fluorine?

a)

Neon

b)

Beryllium

c)

Sodium

d)

Chlorine

90.

The PES spectrum below is for the element _______________.

a)

O

b)

Ne

c)

N

d)

F

91.

Examine the spectrum below. Where would you expect the 2p peak for F be if it were on the same spectrum?

a)

To the left of the peak at 3.04

b)

To the right of the peak at 3.04

c)

To the left of the peak at 1.31

d)

To the right of the peak at 1.31

92.

What does the 4th peak from the left represent?

a)

The 2s electrons

b)

The 3d electrons

c)

The 2p electrons

d)

The 3s electrons

93.

Which peak (or peaks) correspond to the valence electrons?

a)

The peak at 1

b)

The peaks at 1 and 2.05

c)

The peak at 239

d)

The peaks at 239 and 22.7

94.

How many valence electrons does the element pictured in the PES spectrum below have?

a)

1

b)

2

c)

3

d)

4

95.

Where would you expect the 2s peak for Sodium to fall relative to the presented spectrum of a different element below?

a)

Just to the left of the peak at 126

b)

Just to the right of the peak at 126

c)

Just to the left of the peak at 9.07

d)

Just to the right of the peak at 9.07

96.

Which peak (or peaks) correspond to valence electrons?

a)

The peak at 0.8

b)

The peaks at 0.8 and 1.36

c)

The peak at 19.3

d)

The peaks at 19.3 and 1.36

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