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Multiple Choice Flashcards

1
Q

Which of the following answers describes three typical Analytical Instrumental Techniques?

  1. Fluorescence Spectrophotometry, UV/VIS Spectroscopy, Euclidean Geometry
  2. X-ray spectrometry, Raman Spectroscopy, Nuclear Magnetic Resonance Spectroscopy
  3. Omegatron, Ultratron, Coulomtrey
  4. None of the Above
A

X-ray spectrometry, Raman Spectroscopy, Nuclear Magnetic Resonance Spectroscopy

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2
Q

Which answer represents the correct order of operation for most Analytical Instruments?

  1. Stimulus or Source / Sample or System under study / Detector or Response
  2. Stimulus or Source / Detector or Response / Sample or System under study
  3. Detector or Response / Stimulus or Source / Sample or System under study
  4. None of the Above
A

Stimulus or Source / Sample or System under study / Detector or Response

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3
Q

Which of the following is not a normal component of Modern Analytical Instruments?
1. Monochromator
2. Magnetometer
3. Attenuated light beam
4. Photomultiplier Tube

A

Magnetometer

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4
Q

Which of the following is not normally used for sample quantitation?

  1. Internal Standard
  2. Standard Calibration Curve
  3. Standard Addition
  4. Best Guess Scenario
A

Best Guess Scenario

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5
Q

Which of the following is not used in normal electrical circuitry?

  1. Current (I)
  2. Resistance (R)
  3. Standard deviation (STD)
  4. Voltage (V
A

Standard deviation (STD)

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6
Q

True or False? A transducer is a device that converts chemical or physical information into an electrical signal or the reverse.

A

True

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7
Q

A signal chopper would be used to do which if the following?

  1. Provide background noise information
  2. Identify the sample
  3. All of the above
  4. Monitor the detector
A

Provide background noise information

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8
Q

What does H stand for in the VanDeemter equation?

A

Plate Height

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9
Q

What does A stand for in the VanDeemter equation?

A

Tortuosity / multiple flow paths

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10
Q

What does Cm stand for in the VanDeemter equation?

A

Concentration of Mobile Phase

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11
Q

What does Cs stand for in the VanDeemter equation?

A

Concentration of Stationary Phase

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12
Q

What does u stand for in the VanDeemter equation?

A

mobile phase velocity

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13
Q

True or False: Increasing mobile phase velocity will increase plate height.

A

False - Initially, H is reduced

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14
Q

True or False: The tortuosity or multiple flow paths component of the Van Deemter equation is independent of mobile phase velocity.

A

True

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15
Q

True or False: The concentration term of the Van Deemter equation contributes more to plate height as the mobile phase velocity is increased.

A

True

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16
Q

What is the Chromatography method for GC?

17
Q

What is the Chromatography method for HPLC?

18
Q

What is the Chromatography method for CE?

19
Q

What is the Chromatography method for SFC?

A

Supercritical Fluid

20
Q

True or False: Columns in gas chromatography can be significantly longer than other chromatography techniques.

21
Q

True or False: The stationary phase in gas chromatography cannot be a liquid.

22
Q

True or False: You can inject solids into any chromatography system.

23
Q

Theoretical plates in chromatography are a measure of _________ in a method

  1. retention time
  2. peak height
  3. resolution
  4. efficiency
A

efficiency

24
Q

Atomic line broadening resulting from frequency fluctuations due to the motion of atoms in the flame or furnace is known as ….

  1. Zeeman Broadening
  2. Doppler Broadening
  3. Pressure Broadening
  4. Uncertainty Broadening
  5. None of the above
A

Doppler Broadening

25
Most of the elements that can be determined by atomic spectroscopy are... 1. Inert Gasses 2. Metals 3. Non-metals 4. Metalloids 5. None of the above
Metals
26
The general process of sample preparation and isolation in atomic absorption and in atomic emission involves all of the following except- 1. Nebulization 2. Volatilization 3. Desolvation 4. Atomization 5. Constellation
Constellation
27
True or False: The lower detection limits observed for elemental analysis by ICP vs. Flames and other atomization sources (for nearly all elements) are mostly the result of the inert argon atmosphere due to the large amount of argon gas used to create plasma.
False
28
When an atom absorbs a photon, one of its orbital electrons.... 1. is absorbed by the nucleus 2. jumps from a higher to a lower energy state 3. gains energy and is promoted to a higher energy level 4. turns into a gaseous radiation 5. none of the above
gains energy and is promoted to a higher energy level
29
Which of the following is not normally used for sample quantitation? 1. standard addition 2. guess and check 3. internal standard 4. standard callibration curve 5. none of the above
guess and check
30
Which type of radiation has the highest energy? 1. Microwave 2. X-Ray 3. UV 4. IR 5. radio
X-Ray

Analytical Chemistry (2 decks)

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