Olete.in – MCQs, Mock Tests & Government Job Prep | Analytical instruments Analytical Instrumentation MCQ Question Set 2

Which of the following is not the advantage of Fourier Transform Spectrometers?

1. Signal to noise ratio is high
2. Information could be obtained on all frequencies
3. Retrieval of data is possible
4. Easy to maintain

✅ Correct Answer: 4

Which of the following has to be computed to determine transmittance and absorbance at various frequencies?

1. Ratio of signal and noise
2. Ratio of sample and reference spectra
3. Sample spectra
4. Reference spectra

✅ Correct Answer: 2

Computer accepts analog signals directly.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following is the reference that is generally used in FTIR interferometer?

1. Air
2. NaCl solution
3. Alcohol
4. Base solution

✅ Correct Answer: 1

In Michelson Interferometer, if the reflected and transmitted beams are in phase at the beam splitter, then maximum intensity will reach the detector.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In Michelson’s interferometer, the frequency of the detector output can be determined by translating the _____ of movable mirror and the ______ of monochromatic radiation.

1. Velocity, wavelength
2. Thickness, intensity
3. Length, velocity
4. Angle, intensity

✅ Correct Answer: 1

In Michelson’s interferometer, the __________ of the detector output will depend upon the intensity of incoming radiation.

1. Velocity
2. Frequency
3. Amplitude
4. Phase

✅ Correct Answer: 3

Why is the computer necessary in Fourier Transform Spectrometer?

1. To display the detector output
2. To process the detector output
3. To determine the amplitude
4. To determine the frequency

✅ Correct Answer: 2

Which of the following is the principle of Atomic Absorption Spectroscopy?

1. Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
2. Medium absorbs radiation and transmitted radiation is measured
3. Colour is measured
4. Colour is simply observed

✅ Correct Answer: 1

In Atomic Absorption Spectroscopy, which of the following is the generally used radiation source?

1. Tungsten lamp
2. Xenon mercury arc lamp
3. Hydrogen or deuterium discharge lamp
4. Hollow cathode lamp

✅ Correct Answer: 4

In Atomic Absorption Spectroscopy, with what material is the cathode in Hollow cathode lamp constructed?

1. Tungsten
2. Quartz
3. Element to be investigated
4. Aluminium

✅ Correct Answer: 3

How can the intensity of radiation be increased in Hollow cathode lamp?

1. Addition of non-conductive protective shield of mica
2. Addition of nitrogen to neon or argon in the lamp
3. Increasing the pressure of the filling gas
4. Changing the metal of the anode

✅ Correct Answer: 1

Which of the following is the function of the chopper in Atomic Absorption Spectroscopy?

1. To split the beam into two
2. To break the steady light into a pulsating light
3. To filter unwanted components
4. To reduce the sample into atomic state

✅ Correct Answer: 2

Which of the following is the function of the Flame or Emission system in Atomic Absorption Spectroscopy?

1. To split the beam into two
2. To break the steady light into pulsating light
3. To filter unwanted components
4. To reduce the sample into atomic state

✅ Correct Answer: 4

Atomic absorption spectroscopy is also called as Absorption Flame Photometry.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following is not a component of the emission system in Flame photometer?

1. Burner
2. Atomiser
3. Fuel gases and their regulation
4. Chopper

✅ Correct Answer: 4

Which of the following is the function of the atomiser in the emission system of Atomic Absorption Spectroscopy?

1. To split the beam into two
2. To break the steady light into pulsating light
3. To break large mass of liquid into small drops
4. To reduce the sample into atomic state

✅ Correct Answer: 3

Which of the following is not a fuel used in flame photometry?

1. Acetylene
2. Propane
3. Hydrogen
4. Camphor oil

✅ Correct Answer: 4

Which of the following is not the requirement of a good flame in flame photometer?

1. Liquid sample must be evaporated to form solid residue
2. Solid residue must decompose to form atoms
3. Atoms must be produced such that they have the ability to get excited to higher states
4. Atoms must be produced such that they are in stable state

✅ Correct Answer: 4

Atomic Absorption Spectroscopy is used for the analysis of metals.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following options explains the process of ‘sputtering’ that occurs in Hollow Cathode Lamp?

1. Positive ions collide with cathode surface and metal atoms from cathode are ejected
2. Negative ions collide with cathode surface and metal atoms from anode are ejected
3. Positive ions collide with negative ions and metal atoms from anode are ejected
4. Positive ions collide with negative ions and photons are ejected

✅ Correct Answer: 1

At what pressure should the gases in the sealed tube be maintained in the Hollow cathode lamp?

1. 1 to 5 torr
2. 20 to 30 torr
3. 40 to 50 torr
4. 50 to 55 torr

✅ Correct Answer: 1

The function of pressure regulators in the emission system of flame photometer is to have a steady flame which is free from flickers.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

In Total consumption burner, only samples of particular droplet size will enter the burner.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following is the principle of Flame emission photometers?

1. Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
2. Medium absorbs radiation and transmitted radiation is measured
3. Colour and wavelength of the flame is measured
4. Only wavelength of the flame is measured

✅ Correct Answer: 3

In Flame emission photometers, the measurement of ________ is used for qualitative analysis.

1. Colour
2. Intensity
3. Velocity
4. Frequency

✅ Correct Answer: 1

In Flame emission photometers, the measurement of ______ is used for quantitative analysis.

1. Colour
2. Intensity
3. Velocity
4. Frequency

✅ Correct Answer: 2

Which of the following is not an advantage of Laminar flow burner used in Flame photometry?

1. Noiseless
2. Stable flame for analysis
3. Efficient atomization of sample
4. Sample containing two or more solvents can be burned efficiently

✅ Correct Answer: 4

Laminar flow burner used in Flame photometers is also known as _______

1. Turbulent burner
2. Premix burner
3. Total consumption burner
4. Nozzle mix burner

✅ Correct Answer: 2

Which of the following is the advantage of prism monochromators?

1. Dispersion is non-overlapping
2. Dispersion occurs in non-linear manner
3. Dispersion is overlapping
4. Dispersion occurs in a linear manner

✅ Correct Answer: 1

Which of the following is the advantage of grating monochromators?

1. Dispersion is non-overlapping
2. Dispersion occurs in non-linear manner
3. Dispersion is overlapping
4. Dispersion occurs in a linear manner

✅ Correct Answer: 4

Which of the following is not a detector used in Flame emission photometers?

1. Photronic cell
2. Photovoltaic cell
3. Photoemissive tube
4. Chromatogram

✅ Correct Answer: 4

Phototubes are more sensitive than photovoltaic cells.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following is not an application of Flame emission photometers?

1. Analysis of biological fluids
2. Determination of sodium, potassium in soil
3. Determination of metals such as Mn, Cu
4. Analysis of complex mixtures

✅ Correct Answer: 4

Which of the following is not an advantage of a photovoltaic cell which is used as a detector in Flame emission photometers?

1. Portable
2. No external supply
3. Robust in construction
4. Does not show fatigue

✅ Correct Answer: 4

Chromatography is a physical method that is used to separate and analyse _____

1. Simple mixtures
2. Complex mixtures
3. Viscous mixtures
4. Metals

✅ Correct Answer: 2

In which type of chromatography, the stationary phase held in a narrow tube and the mobile phase is forced through it under pressure?

1. Column chromatography
2. Planar chromatography
3. Liquid chromatography
4. Gas chromatography

✅ Correct Answer: 1

In chromatography, the stationary phase can be _____ supported on a solid.

1. Solid or liquid
2. Liquid or gas
3. Solid only
4. Liquid only

✅ Correct Answer: 1

In chromatography, which of the following can the mobile phase be made of?

1. Solid or liquid
2. Liquid or gas
3. Gas only
4. Liquid only

✅ Correct Answer: 2

Which of the following cannot be used as an adsorbent in Column adsorption chromatography?

1. Magnesium oxide
2. Silica gel
3. Activated alumina
4. Potassium permanganate

✅ Correct Answer: 4

Which of the following types of chromatography involves the separation of substances in a mixture over a 0.2mm thick layer of an adsorbent?

1. Gas liquid
2. Column
3. Thin layer
4. Paper-checking

✅ Correct Answer: 3

Chromatography cannot be used to purify volatile substances.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In Column chromatography, the stationary phase is made of _________ and the mobile phase is made of _____

1. Solid, liquid
2. Liquid, liquid
3. Liquid, gas
4. Solid, gas

✅ Correct Answer: 1

Chromatography cannot be used to separate delicate products.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In Thin layer chromatography, the stationary phase is made of _________ and the mobile phase is made of ______

1. Solid, liquid
2. Liquid, liquid
3. Liquid, gas
4. Solid, gas

✅ Correct Answer: 1

In which of the following type of paper, chromatography does the mobile phase move horizontally over a circular sheet of paper?

1. Ascending paper chromatography
2. Descending paper chromatography
3. Radial paper chromatography
4. Ascending – descending chromatography

✅ Correct Answer: 3

Liquid chromatography can be performed in which of the following ways?

1. Only in columns
2. Only on plane surfaces
3. Either in columns or on plane surfaces
4. Neither in columns nor on plane surfaces

✅ Correct Answer: 3

Gas chromatography can be performed in which of the following ways?

1. Only in columns
2. Only on plane surfaces
3. Either in columns or on plane surfaces
4. Neither in columns nor on plane surfaces

✅ Correct Answer: 1

In Gas-liquid phase chromatography, the stationary phase is composed of _________ and the mobile phase is made of ______

1. Solid, liquid
2. Liquid, liquid
3. Liquid, gas
4. Solid, gas

✅ Correct Answer: 3

Which of the following types of chromatography involves the process, where the mobile phase moves through the stationary phase by the influence of gravity or capillary action?

1. Column Chromatography
2. High Pressure Liquid Chromatography
3. Gas Chromatography
4. Planar Chromatography

✅ Correct Answer: 4

Which of the following steps takes place after injection of feed in Column chromatography?

1. Detection of components
2. Separation in the column
3. Elution from the column
4. Collection of eluted component

✅ Correct Answer: 2

Components with a strong attraction to the support move more slowly than components with weak attraction.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

What happens during the ‘elution from the column’ phase in chromatography?

1. Components with greatest affinity elute first
2. Components with least affinity elute first
3. Components elute in a random manner
4. Components elute according to their concentration in the mixture

✅ Correct Answer: 2

In chromatogram, the position of peaks on the time axis can be used to determine which of the following?

1. Components of the sample
2. Amount of component in the sample
3. Column efficiency
4. Column resolution

✅ Correct Answer: 1

In chromatogram, the area under the peak can be used to determine which of the following?

1. Components of the sample
2. Amount of component in the sample
3. Column efficiency
4. Column resolution

✅ Correct Answer: 2

The stationary phase could be a viscous liquid coated over a surface of solid particles.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Using Chromatogram as detector in Chromatography, a graph is obtained between _______and time.

1. Quantity
2. Density
3. Concentration
4. Specific gravity

✅ Correct Answer: 3

In older analytical methods, which of the following methods were used to allow movement of the mobile phase?

1. Pumps
2. Pressure
3. Gravity
4. Blowing air into the column

✅ Correct Answer: 3

How is the molar concentration of solute in stationary phase related to molar concentration of solute in the mobile phase?

1. Directly proportional
2. Inversely proportional
3. Equal
4. Not related

✅ Correct Answer: 1

If the value of the distribution constant ‘k’ is one, then what could be inferred about the distribution of solute?

1. Its distribution in stationary phase is greater
2. Its distribution in mobile phase is greater
3. It is equally distributed in stationary and mobile phase
4. It is distributed in a random manner

✅ Correct Answer: 3

The time taken by the analyte after sample injection to reach the detector is called ______

1. Dead time
2. Solute migration rate
3. Adjusted retention time
4. Retention time

✅ Correct Answer: 4

The time required for a molecule of the mobile phase to pass through the column is called _______

1. Dead time
2. Solute migration rate
3. Adjusted retention time
4. Retention time

✅ Correct Answer: 1

Adjusted retention time is the remaining retention time after subtracting _____ from _____

1. Solute migration rate and retention time
2. Retention time and solute migration rate
3. Retention time and solute migration rate
4. Retention time and dead time

✅ Correct Answer: 3

Which of the following is the volume of mobile phase required to make a solute band move from the point of injection through the column to the detector?

1. Dead volume
2. Retention volume
3. Void volume
4. Adjusted retention volume

✅ Correct Answer: 2

Adjusted retention volume is the remaining retention volume after subtracting ___________ from _____

1. Solute migration rate and retention volume
2. Retention volume and solute migration rate
3. Dead volume and retention volume
4. Retention volume and dead volume

✅ Correct Answer: 3

Which of the following is defined as the ratio of moles of solute in stationary phase to the moles of solute in the mobile phase?

1. Distribution constant
2. Volumetric phase ratio
3. Retention factor
4. Total porosity

✅ Correct Answer: 3

Which of the following is the ratio of the interstitial volume of packing to the volume of its total mass?

1. Distribution constant
2. Volumetric phase ratio
3. Retention factor
4. Total porosity

✅ Correct Answer: 4

Which of the following is the ratio of the length of column packing to dead time?

1. Average linear rate of solute migration
2. Average linear rate of mobile migration
3. Relative migration rate
4. Selectivity factor

✅ Correct Answer: 2

Which of the following is the ratio of a length of column packing to retention time?

1. Average linear rate of solute migration
2. Average linear rate of mobile migration
3. Relative migration rate
4. Selectivity factor

✅ Correct Answer: 1