Free Printable MICROWAVE SPECTROSCOPY

1.

CONDITION FOR THE MOLECULE TO BE MICROWAVE ACTIVE

a)

CHANGE IN DIPOLEMOMENT

b)

CHANGE IN POLARSIBILITY

c)

PERMANENT DIPOLE MOMENT

d)

ALL

2.

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

a)

infrared

b)

ultraviolet

c)

microwaves

d)

radiowaves

3.

Which of the following molecules show microwave activity?

a)

H2

b)

CO2

c)

SF6

d)

CH3Cl

4.

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

a)

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

b)

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

c)

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

d)

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

5.

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)

6.

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,….

7.

The different types of energies associated with a molecule are __________

a)

Vibrational energy

b)

electronic energy

c)

Rotational energy

d)

All of these

8.

Molecules which are having _______ are microwave active.

a)

Dipole moment

b)

High pressure Detector

c)

Principle axis

d)

Acidity

9.

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

10.

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

a)

wavelength,frequency

b)

Energy,velocity

c)

Speed,Rate

d)

None

11.

Joules can be converted to cm^-1

a)

Multiply by h

b)

Multiply by hc

c)

Divide by h

d)

Divide by hc

12.

Rotational spectrum is useful to determine the

(a)

13.

Intensity of spectral lines depends on

a)

energy of the energy level

b)

population of the energy level

c)

J value

d)

B Value

14.

Plot of N_J/N₀against J gives

a)

Boltzmann curve

b)

Gaussian curve

c)

Parabola curve

d)

Morse curve

15.

The molecule which is microwave active

a)

H₂

b)

O₂

c)

HCl

d)

co₂

16.

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

17.

As J value increases, the energy of the energy level

a)

Increases

b)

Decreases

c)

Remains same

d)

Remains constant

18.

Selection rule of rotational spectrum

a)

,Dn=±1

b)

DS=0

c)

,DJ=±1

d)

,DJ=0

19.

The rotational spectrum consits of a series of lines at

a)

2B

b)

B

c)

4B

d)

6B

20.

Bond length can be determined using

a)

Moment of inertia

b)

Energy

c)

Angular momentum

d)

Plancks constant

MICROWAVE SPECTROSCOPY

Total questions: 20

Worksheet time: 4mins

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