Which technique is commonly used for the identification and quantification of chemical compounds based on their absorption of light?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Nuclear magnetic resonance (NMR)
Answer: c) UV-Vis spectroscopy
Gas chromatography is a separation technique based on:
a) Partitioning of compounds between a stationary phase and a mobile phase
b) Electrophoretic mobility of compounds in a gel matrix
c) Ionization of compounds in a mass spectrometer
d) Absorption of compounds onto a solid support
Answer: a) Partitioning of compounds between a stationary phase and a mobile phase
Which technique is commonly used for the determination of the elemental composition of a sample?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Atomic absorption spectroscopy
Answer: d) Atomic absorption spectroscopy
Which technique is commonly used for the separation and analysis of complex mixtures based on differences in their boiling points?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Gas chromatography
Answer: d) Gas chromatography
Which technique is commonly used for the identification and structural elucidation of chemical compounds based on their mass-to-charge ratio?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Nuclear magnetic resonance (NMR)
Answer: b) Mass spectrometry
Liquid chromatography is a separation technique based on:
a) Partitioning of compounds between a stationary phase and a mobile phase
b) Electrophoretic mobility of compounds in a gel matrix
c) Ionization of compounds in a mass spectrometer
d) Absorption of compounds onto a solid support
Answer: a) Partitioning of compounds between a stationary phase and a mobile phase
Which technique is commonly used for the determination of the molecular weight and structure of chemical compounds?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Nuclear magnetic resonance (NMR)
Answer: d) Nuclear magnetic resonance (NMR)
Which technique is commonly used for the separation and analysis of complex mixtures based on differences in their charge-to-mass ratio?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Electrophoresis
Answer: d) Electrophoresis
Which technique is commonly used for the determination of the concentration of a specific element in a sample?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Atomic emission spectroscopy
Answer: d) Atomic emission spectroscopy
Which technique is commonly used for the separation and analysis of complex mixtures based on differences in their affinity for a stationary phase and a mobile phase?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Nuclear magnetic resonance (NMR)
Answer: a) Chromatography
Fourier transform infrared (FTIR) spectroscopy is a technique used for:
a) Determining the molecular weight of a compound
b) Analyzing the elemental composition of a compound
c) Detecting specific functional groups in a compound
d) Separating and quantifying compounds in a mixture
Answer: c) Detecting specific functional groups in a compound
X-ray diffraction is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Characterizing the crystal structure of a compound
d) Separating and quantifying compounds in a mixture
Answer: c) Characterizing the crystal structure of a compound
Inductively coupled plasma mass spectrometry (ICP-MS) is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Detecting specific functional groups in a compound
d) Separating and quantifying compounds in a mixture
Answer: a) Analyzing the elemental composition of a compound
High-performance liquid chromatography (HPLC) is a technique used for:
a) Determining the molecular weight of a compound
b) Analyzing the elemental composition of a compound
c) Separating and quantifying compounds in a mixture
d) Detecting specific functional groups in a compound
Answer: c) Separating and quantifying compounds in a mixture
Ultraviolet-visible (UV-Vis) spectroscopy is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Detecting specific functional groups in a compound
d) Absorption measurement of compounds in the UV-Vis range
Answer: d) Absorption measurement of compounds in the UV-Vis range
Gas chromatography-mass spectrometry (GC-MS) is a technique used for:
a) Separating and quantifying compounds in a mixture
b) Determining the molecular weight of a compound
c) Analyzing the elemental composition of a compound
d) Detecting specific functional groups in a compound
Answer: a) Separating and quantifying compounds in a mixture
Flame atomic absorption spectroscopy (FAAS) is a technique used for:
a) Determining the molecular weight of a compound
b) Analyzing the elemental composition of a compound
c) Detecting specific functional groups in a compound
d) Separating and quantifying compounds in a mixture
Answer: b) Analyzing the elemental composition of a compound
Thin-layer chromatography (TLC) is a technique used for:
a) Determining the molecular weight of a compound
b) Analyzing the elemental composition of a compound
c) Separating and quantifying compounds in a mixture
d) Detecting specific functional groups in a compound
Answer: c) Separating and quantifying compounds in a mixture
Nuclear magnetic resonance (NMR) spectroscopy is a technique used for:
a) Separating and quantifying compounds in a mixture
b) Determining the molecular weight of a compound
c) Analyzing the elemental composition of a compound
d) Structural elucidation of compounds
Answer: d) Structural elucidation of compounds
Capillary electrophoresis is a technique used for:
a) Determining the molecular weight of a compound
b) Analyzing the elemental composition of a compound
c) Separating and quantifying compounds in a mixture
d) Detecting specific functional groups in a compound
Answer: c) Separating and quantifying compounds in a mixture
In gas chromatography, the stationary phase is typically:
a) A solid material
b) A liquid film coated on a solid support
c) A gel matrix
d) A gas
Answer: b) A liquid film coated on a solid support
In liquid chromatography, the mobile phase is typically:
a) A solid material
b) A liquid solvent
c) A gel matrix
d) A gas
Answer: b) A liquid solvent
Which technique is commonly used for the separation and analysis of proteins based on their size and charge?
a) Chromatography
b) Mass spectrometry
c) UV-Vis spectroscopy
d) Electrophoresis
Answer: d) Electrophoresis
In atomic absorption spectroscopy, the absorption of light by atoms is used to determine the:
a) Elemental composition of a sample
b) Molecular weight of a compound
c) Functional groups present in a compound
d) Optical activity of a compound
Answer: a) Elemental composition of a sample
High-performance liquid chromatography (HPLC) can be used to separate and quantify compounds in a mixture based on differences in their:
a) Boiling points
b) Charge-to-mass ratios
c) Absorption of light
d) Affinity for a stationary phase
Answer: d) Affinity for a stationary phase
Gas chromatography-mass spectrometry (GC-MS) combines the separation capabilities of gas chromatography with the identification capabilities of:
a) UV-Vis spectroscopy
b) Nuclear magnetic resonance (NMR) spectroscopy
c) Mass spectrometry
d) Fourier transform infrared (FTIR) spectroscopy
Answer: c) Mass spectrometry
Inductively coupled plasma optical emission spectroscopy (ICP-OES) is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Detecting specific functional groups in a compound
d) Separating and quantifying compounds in a mixture
Answer: a) Analyzing the elemental composition of a compound
X-ray fluorescence (XRF) spectroscopy is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Detecting specific functional groups in a compound
d) Separating and quantifying compounds in a mixture
Answer: a) Analyzing the elemental composition of a compound
Fourier transform infrared (FTIR) spectroscopy can be used to identify chemical compounds based on their:
a) Mass-to-charge ratio
b) Absorption of light in the UV-Vis range
c) Infrared absorption bands
d) Electrophoretic mobility
Answer: c) Infrared absorption bands
In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is a measure of:
a) Absorption of light in the UV-Vis range
b) Electrophoretic mobility
c) The magnetic field strength
d) The chemical environment of a nucleus
Answer: d) The chemical environment of a nucleus
Gas chromatography with flame ionization detection (GC-FID) is a technique used for the quantification of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Volatile organic compounds in a mixture
d) Inorganic salts in a solution
Answer: c) Volatile organic compounds in a mixture
In atomic emission spectroscopy, the intensity of emitted light is used to determine the:
a) Elemental composition of a sample
b) Molecular weight of a compound
c) Functional groups present in a compound
d) Optical activity of a compound
Answer: a) Elemental composition of a sample
High-performance liquid chromatography with diode array detection (HPLC-DAD) is a technique used for the identification and quantification of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Volatile organic compounds in a mixture
d) UV-absorbing compounds in a mixture
Answer: d) UV-absorbing compounds in a mixture
In gas chromatography, the retention time is a measure of the:
a) Boiling point of a compound
b) Charge-to-mass ratio of a compound
c) Absorption of light by a compound
d) Partitioning of a compound between a stationary phase and a mobile phase
Answer: d) Partitioning of a compound between a stationary phase and a mobile phase
In liquid chromatography, the elution volume is a measure of the:
a) Boiling point of a compound
b) Charge-to-mass ratio of a compound
c) Absorption of light by a compound
d) Retention of a compound on a stationary phase
Answer: d) Retention of a compound on a stationary phase
Flame photometry is a technique used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Volatile organic compounds in a mixture
d) Inorganic salts in a solution
Answer: a) Elements in a sample
High-performance liquid chromatography with mass spectrometry detection (HPLC-MS) is a technique used for the identification and quantification of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Volatile organic compounds in a mixture
d) Compounds based on their mass-to-charge ratio
Answer: d) Compounds based on their mass-to-charge ratio
Infrared spectroscopy is a technique used for the identification of chemical compounds based on their:
a) Mass-to-charge ratio
b) Absorption of light in the UV-Vis range
c) Infrared absorption bands
d) Electrophoretic mobility
Answer: c) Infrared absorption bands
Differential scanning calorimetry (DSC) is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Measuring the heat flow in a sample as a function of temperature
d) Separating and quantifying compounds in a mixture
Answer: c) Measuring the heat flow in a sample as a function of temperature
Karl Fischer titration is a technique used for the determination of:
a) Elements in a sample
b) Water content in a sample
c) pH of a solution
d) Acidity or basicity of a compound
Answer: b) Water content in a sample
Liquid-liquid extraction is a technique used for:
a) Separating and purifying compounds from a mixture
b) Quantifying the concentration of an element in a sample
c) Measuring the pH of a solution
d) Determining the viscosity of a compound
Answer: a) Separating and purifying compounds from a mixture
Gravimetric analysis is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Quantifying the concentration of an element in a sample
d) Measuring the optical activity of a compound
Answer: c) Quantifying the concentration of an element in a sample
Ion chromatography is a technique used for the analysis of:
a) Organic compounds in a mixture
b) Metal ions in a sample
c) Volatile compounds in a mixture
d) UV-absorbing compounds in a sample
Answer: b) Metal ions in a sample
Differential pulse voltammetry is a technique used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Electroactive species in a sample
d) Volatile organic compounds in a mixture
Answer: c) Electroactive species in a sample
Inductively coupled plasma optical emission spectroscopy (ICP-OES) can be used for the analysis of:
a) Organic compounds in a mixture
b) Metal ions in a sample
c) Volatile compounds in a mixture
d) UV-absorbing compounds in a sample
Answer: b) Metal ions in a sample
Polarimetry is a technique used for the measurement of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Optical rotation of a compound
d) Absorption of light by a compound
Answer: c) Optical rotation of a compound
Total organic carbon (TOC) analysis is a technique used for the determination of:
a) Elements in a sample
b) Volatile organic compounds in a mixture
c) Organic carbon content in a sample
d) Inorganic carbon content in a sample
Answer: c) Organic carbon content in a sample
Ultraviolet-visible (UV-Vis) spectroscopy can be used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Molecular weight of a compound
Answer: c) Absorption of light in the UV-Vis range
In gas chromatography, the detector commonly used for quantification is:
a) Flame ionization detector (FID)
b) Mass spectrometer (MS)
c) UV-Vis detector
d) Electrochemical detector
Answer: a) Flame ionization detector (FID)
Inductively coupled plasma mass spectrometry (ICP-MS) is a technique used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Molecular weight of a compound
Answer: a) Elements in a sample
In liquid chromatography, the detector commonly used for quantification is:
a) Flame ionization detector (FID)
b) Mass spectrometer (MS)
c) UV-Vis detector
d) Electrochemical detector
Answer: c) UV-Vis detector
Atomic force microscopy (AFM) is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Imaging the surface of a sample at the nanoscale
d) Separating and quantifying compounds in a mixture
Answer: c) Imaging the surface of a sample at the nanoscale
Derivative spectroscopy is a technique used to enhance the:
a) Sensitivity of a UV-Vis spectroscopy measurement
b) Resolution of a chromatographic separation
c) Detection limit of a mass spectrometry analysis
d) Accuracy of an elemental analysis
Answer: a) Sensitivity of a UV-Vis spectroscopy measurement
An ion-selective electrode (ISE) is a sensor used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Ions in a solution
d) Volatile organic compounds in a mixture
Answer: c) Ions in a solution
Gel electrophoresis is a technique used for the separation and analysis of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Proteins and nucleic acids
d) UV-absorbing compounds in a sample
Answer: c) Proteins and nucleic acids
In liquid chromatography, the stationary phase is typically:
a) A solid material
b) A liquid solvent
c) A gel matrix
d) A gas
Answer: a) A solid material
X-ray photoelectron spectroscopy (XPS) is a technique used for the analysis of:
a) Organic compounds in a mixture
b) Metal ions in a sample
c) Surface composition and chemical state of elements
d) UV-absorbing compounds in a sample
Answer: c) Surface composition and chemical state of elements
Fourier transform infrared (FTIR) spectroscopy can be used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Molecular weight of a compound
Answer: b) Compounds with specific functional groups
Liquid chromatography-mass spectrometry (LC-MS) is a technique used for the identification and quantification of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Compounds based on their mass-to-charge ratio
Answer: d) Compounds based on their mass-to-charge ratio
In gas chromatography, the separation is based on differences in:
a) The molecular weight of compounds
b) The absorption of light by compounds
c) The boiling points of compounds
d) The electrophoretic mobility of compounds
Answer: c) The boiling points of compounds
Atomic absorption spectroscopy (AAS) can be used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Molecular weight of a compound
Answer: a) Elements in a sample
Matrix-assisted laser desorption/ionization (MALDI) is a technique used for:
a) Analyzing the elemental composition of a compound
b) Determining the molecular weight of a compound
c) Imaging the surface of a sample at the nanoscale
d) Ionizing and desorbing biomolecules for mass spectrometry analysis
Answer: d) Ionizing and desorbing biomolecules for mass spectrometry analysis
In liquid chromatography, the separation is based on differences in:
a) The molecular weight of compounds
b) The absorption of light by compounds
c) The affinity of compounds for a stationary phase
d) The electrophoretic mobility of compounds
Answer: c) The affinity of compounds for a stationary phase
Raman spectroscopy is a technique used for the analysis of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Infrared absorption bands
d) Vibrational and rotational modes of molecules
Answer: d) Vibrational and rotational modes of molecules
In gas chromatography, the carrier gas is typically:
a) A solid material
b) A liquid solvent
c) A gel matrix
d) A gas
Answer: d) A gas
Atomic emission spectroscopy (AES) can be used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) Absorption of light in the UV-Vis range
d) Molecular weight of a compound
Answer: a) Elements in a sample
X-ray crystallography is a technique used for the determination of:
a) Elements in a sample
b) Compounds with specific functional groups
c) The crystal structure of a compound
d) The molecular weight of a compound
Answer: c) The crystal structure of a compound
Infrared spectroscopy is commonly used to analyze:
a) Inorganic compounds
b) Organic compounds
c) Both inorganic and organic compounds
d) Metallic compounds
Answer: c) Both inorganic and organic compounds
Chromatography can be classified as:
a) A destructive analytical technique
b) A non-destructive analytical technique
c) Both destructive and non-destructive depending on the conditions
d) None of the above
Answer: b) A non-destructive analytical technique
Spectroscopic techniques are commonly used in chemical analysis because they provide information about:
a) The elemental composition of a sample
b) The molecular structure of a compound
c) The physical properties of a substance
d) All of the above
Answer: d) All of the above
