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ANALYTICAL TECHNIQUES

Total questions: 60

Worksheet time: 45mins

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.
What is the light that you can see called?
a)
observatory
b)
wavelength
c)
visible light
5.
Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy
a)
Radio waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
X-rays
6.

What do spectroscopes do?

a)

Collect light to identify elements

b)

Refract light

c)

Absorb light

d)

Transmit light

7.
The _______________ determines the color of visible light. 
a)
wavelength
b)
speed
c)
amplitude
d)
light
8.
Which model of the atom said that electrons circle the nucleus in orbits of a fixed radius?
a)
Bohr model
b)
Quantum mechanical model
c)
Not true of either model
d)
Both Bohr and Quantum mechanical model
9.
Emission of light from an atom occurs when an electron
a)
drops from a higher to a lower energy level.
b)
   jumps from a lower to a higher energy level.   
c)
   moves within its atomic orbital.
d)
falls into the nucleus.
10.
The ground state is the highest energy state of an atom.
a)
True
b)
False
11.
For an electron to change from ground state to an excited stated it must...
a)
Absorb energy
b)
Release energy
12.
When talking about energy levels in an atom, what is an "excited state"?
a)
The highest energy state of an atom.
b)
Any level higher than the ground state.
c)
The lowest energy state of an atom.
d)
When an atom loses an electron
13.

Based on the picture, choose the best description of how wavelength and frequency are related

a)

As wavelength increases, frequency increases

b)

As frequency increases, wavelength decreases

c)

As frequency increases, wavelength remains the same

d)

Frequency and wavelength mean the same thing

14.

What happens to wavelength as the frequency of a wave increases?

a)

increase

b)

stays the same

c)

decreases

d)

becomes faster

15.

What electromagnetic wave has the longest wavelengths and lowest frequencies?

a)

Microwaves

b)

Ultraviolet Rays

c)

Infrared Waves

d)

Radio Waves

16.

What electromagnetic wave do humans emit as heat energy?

a)

infrared light

b)

ultraviolet light

c)

visible light

d)

microwaves

17.

Which of the following is correct in order from lowest to highest energy?

a)

X Rays, Visible Light, Microwave

b)

Ultraviolet, Visible Light, Gamma-Rays

c)

Microwave, Visible Light, Gamma Rays

18.

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

19.

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*

20.

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*

21.

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*

22.

Which of the following is not an auxochrome group?

a)

–OH

b)

–SH

c)

–OR

d)

–O2

23.

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

a)

Hypochromic

b)

Hyperchromic

c)

Hypsochromic

d)

Bathochromic

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.

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

a)

σ→σ*

b)

π→π*

c)

n→π*

d)

n→σ*

28.

Which one is not correct

a)

Spectroscopy is the study of spectrum

b)

Spectroscopy is the study of interaction of one radiation with other radiation

c)

Spectroscopy is the study of interaction of radiation with matter

d)

the radiation used is EMR

29.

Which of the following statements is correct?

a)

Infrared radiation has a shorter wavelength than visible light.

b)

Infrared radiation has a lower wavenumber than visible light.

c)

Ultraviolet radiation has a longer wavelength than infrared radiation.

d)

Microwave radiation possesses more energy than infrared radiation.

30.

Which statement is correct?

a)

Wavelength is directly proportional to frequency.

b)

Wavelength is directly proportional to energy.

c)

Wavenumber is directly proportional to wavelength.

d)

Wavenumber is directly proportional to energy.

31.

The wavelength of an absorption is 495 nm. In what part of the electromagnetic spectrum does this lie?

a)

Radiowave

b)

Infrared

c)

Ultraviolet-visible

d)

Microwave

32.

UV range from 10 to 200 nm is known as

a)

Far UV

b)

Near UV

c)

Mid UV

d)

None of the above

33.

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

34.

The analysis of the way matter emits and absorbs radiation is called ___.

a)

astronomy

b)

chemistry

c)

spectroscopy

d)

atomic theory

35.

Which of the following is the atomic emission spectroscopy methods?

a)

Graphite Furnace Atomic Emission Spectroscopy

b)

Inductively Couple Plasma- Optical Emission Spectroscopy

c)

Flame Atomic Emission Spectroscopy

d)

Hydride Generation Atomic Emission Spectroscopy

36.

A particle of light is called a...

a)

Photoelectron

b)

Photon

c)

Proton

d)

Electron

37.

The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

a)

Intensity

b)

Wavelength

c)

Frequency

d)

Energy

38.
This image is an illustration of
a)
photoelectric effect
b)
Dalton's atomic theory
c)
Bohr model
d)
Quantum mechanical model
39.

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

40.
In a flame test the ______________
are excited
a)
protons
b)
neutrons
c)
electrons
d)
bonds
41.
Which of the following type of electromagnetic radiation affects the bonds,vibrating ,stretching rocking...
a)
infrared
b)
ultraviolet
c)
microwaves
d)
radiowaves
42.
Non polar symmetrical molecules 
a)
do not absorb IR radiation
b)
absorb IR  radiation
c)
absorb the most IR  radiation
d)
transmit IR radiation
43.
The finger print region is 
a)
different for each organic compound
b)
 from 600 - 1400 cm-1
c)
both the above
44.
The actual wavelength which is absorbed by any bond can vary.  
a)
True
b)
False
45.
Stronger bonds absorb  IR at 
a)
higher wave numbers
b)
lower wave numbers
c)
in the finger print region
d)
600cm-1
46.

Atomic absorption is dependent on the amount of __________ atoms and atomic emission is dependent on the amount of _________ atoms.

a)

ground state; ionised state

b)

ground state; excited state

c)

excited state; ionised state

d)

excited state; ground state

47.

Flame atomic emission can be performed on the same instrument as flame atomic absorption

a)

with lower flame temperature

b)

without the monochromator

c)

in the presence of ionization supressors

d)

without the lamp source

48.
The blue section of the wave is measuring _________________.
a)
wavelength
b)
crest
c)
trough
d)
amplitude 
49.
What is a photon?
a)
When radiation burst through electric waves
b)
The emission of electrons from a metal caused by light striking the metal
c)
The rate at which a waves energy flows through a given unit of area.
d)
packets of electromagnetic energy
50.
According to the Bohr Model, electrons are only found in specific orbits around the nucleus called __________________________
a)
Energy Levels
b)
Electron Lanes
c)
Electron Places
d)
Atomic Mass
51.

When atoms _____________ energy, their electrons move to higher energy levels. These electrons _____________ energy by emitting light when they return to lower energy levels.

a)

lose, absorb

b)

absorb, lose

c)

lose, lose

d)

absorb, absorb

52.

Which type of spectra measures the light that a gas absorbs and produces dark lines?

a)

Absorption spectra

b)

Emission spectra

c)

Continuous spectra

53.

How is white light able to separate through a prism?

a)

the light is being absorbed

b)

the light is being refracted

c)

the light is being reflected

54.

Electromagnetic waves vary in

a)

the speed they travel in a vacuum.

b)

wavelength and frequency.

c)

the way they reflect.

d)

the orientation of their electric and magnetic fields.

55.

The different types of energies associated with a molecule are __________

a)

Vibrational energy

b)

electronic energy

c)

Rotational energy

d)

All of these

56.

Molecules which are having _______ are microwave active.

a)

Dipole moment

b)

High pressure Detector

c)

Principle axis

d)

Acidity

57.

Lithium Flame Test?

a)

red

b)

orange

c)

yellow

d)

green

58.

Sodium

a)

red

b)

orange

c)

yellow

d)

green

59.
Absorption of energy by an electron results in 
a)
it moving from the ground to an excited state
b)
it moving from an excited to the ground state
c)
the emission of a photon
d)
it moving from an excited to the ground state and the emission of a photon
60.
In a flame test the ______________
are excited
a)
protons
b)
neutrons
c)
electrons
d)
bonds

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