Analytical Techniques

Q. What is the principle behind using UV-Vis spectroscopy for qualitative analysis?
  • A. It measures the mass of ions
  • B. It detects the color of the solution
  • C. It identifies functional groups based on absorbance
  • D. It separates ions based on charge
Q. What is the purpose of a back titration?
  • A. To determine the concentration of a reactant indirectly
  • B. To measure the temperature of a solution
  • C. To identify the solubility of a compound
  • D. To calculate the pH of a solution
Q. What is the purpose of a standard solution in titration?
  • A. To provide a known concentration for comparison
  • B. To dilute the analyte solution
  • C. To act as a solvent
  • D. To change the color of the solution
Q. What is the purpose of a titration in analytical chemistry?
  • A. To separate components of a mixture
  • B. To determine the concentration of a solution
  • C. To measure the absorbance of a solution
  • D. To identify the molecular weight of a compound
Q. What is the purpose of a titration in qualitative analysis?
  • A. To determine the molecular weight of a compound
  • B. To identify the endpoint of a reaction
  • C. To measure the boiling point of a solution
  • D. To separate components of a mixture
Q. What is the purpose of using a blank in UV-Vis spectroscopy?
  • A. To calibrate the instrument
  • B. To measure the sample concentration
  • C. To account for solvent absorbance
  • D. To enhance signal detection
Q. What is the purpose of using a blank sample in UV-Vis spectroscopy?
  • A. To calibrate the instrument
  • B. To increase the sensitivity of the measurement
  • C. To provide a reference for baseline correction
  • D. To enhance the sample's absorbance
Q. What is the purpose of using a buffer solution in a titration?
  • A. To maintain a constant pH
  • B. To increase the reaction rate
  • C. To dilute the analyte
  • D. To enhance color change
Q. What is the purpose of using a buffer solution in electrophoresis?
  • A. To increase the conductivity of the solution
  • B. To maintain a constant pH during the separation
  • C. To enhance the visibility of the bands
  • D. To prevent overheating of the gel
Q. What is the purpose of using a pH meter in titration?
  • A. To measure the volume of titrant added
  • B. To determine the exact endpoint of the titration
  • C. To mix the solutions thoroughly
  • D. To calculate the concentration of the analyte
Q. What is the purpose of using a reference sample in UV-Vis spectroscopy?
  • A. To calibrate the instrument
  • B. To increase the sensitivity of the measurement
  • C. To compare the sample's absorbance against a known standard
  • D. To reduce background noise
Q. What is the purpose of using a standard solution in titration?
  • A. To dilute the analyte
  • B. To provide a known concentration for comparison
  • C. To stabilize the temperature
  • D. To increase the reaction rate
Q. What is the role of a back titration?
  • A. To determine the concentration of a strong acid
  • B. To analyze a sample that is difficult to titrate directly
  • C. To measure the pH of a solution
  • D. To separate components in a mixture
Q. What is the role of a buffer in a titration involving a weak acid and a strong base?
  • A. To increase the reaction rate
  • B. To maintain a constant pH
  • C. To enhance the solubility of the acid
  • D. To provide a color change indicator
Q. What is the role of a buffer solution in a titration?
  • A. To maintain a constant pH
  • B. To increase the reaction rate
  • C. To provide a color change
  • D. To dilute the solution
Q. What is the role of a buffer solution in electrophoresis?
  • A. To enhance the conductivity of the gel
  • B. To maintain a constant pH during the separation
  • C. To increase the size of the molecules
  • D. To provide a source of ions
Q. What is the role of a buffer solution in titration?
  • A. To maintain a constant pH
  • B. To increase the reaction rate
  • C. To dilute the titrant
  • D. To change the color of the solution
Q. What is the role of a chelating agent in qualitative analysis?
  • A. To increase solubility
  • B. To stabilize metal ions
  • C. To enhance color change
  • D. To precipitate ions
Q. What is the role of a pH indicator in a titration for qualitative analysis?
  • A. To measure the temperature of the solution
  • B. To indicate the endpoint of the titration
  • C. To separate ions in the solution
  • D. To enhance the color of the solution
Q. What is the role of a pH indicator in a titration?
  • A. To increase the reaction rate
  • B. To provide a color change at the endpoint
  • C. To stabilize the solution
  • D. To dilute the reactants
Q. What is the role of a reagent in a qualitative analysis?
  • A. To increase the temperature of the reaction
  • B. To change the color of the solution
  • C. To provide a specific reaction with the target ion
  • D. To dilute the sample
Q. What is the role of a solvent in UV-Vis spectroscopy?
  • A. To enhance the absorption of light
  • B. To provide a medium for the sample
  • C. To scatter light for better detection
  • D. To change the wavelength of light
Q. What is the role of a titrant in a titration for qualitative analysis?
  • A. To provide a color change
  • B. To react with the analyte
  • C. To stabilize the solution
  • D. To dilute the sample
Q. What is the role of a titrant in a titration process?
  • A. To react with the analyte
  • B. To dilute the solution
  • C. To stabilize the pH
  • D. To measure absorbance
Q. What is the role of a titrant in a titration?
  • A. To react with the analyte
  • B. To dilute the solution
  • C. To stabilize the pH
  • D. To measure the volume
Q. What is the role of electrophoresis in the analysis of biological samples?
  • A. To separate ions based on their charge and size
  • B. To measure the absorbance of light
  • C. To quantify the concentration of gases
  • D. To determine the boiling point of compounds
Q. What is the role of indicators in titration for qualitative analysis?
  • A. To increase the reaction rate
  • B. To provide a color change at the endpoint
  • C. To stabilize the solution
  • D. To separate the ions
Q. What is the role of the titrant in a titration?
  • A. To react with the analyte
  • B. To dilute the solution
  • C. To measure the temperature
  • D. To stabilize the pH
Q. What is the significance of the baseline in an IR spectrum?
  • A. It indicates the presence of noise
  • B. It represents the absorbance of the solvent
  • C. It shows the sample concentration
  • D. It is used for calibration purposes
Q. What is the significance of the Beer-Lambert Law in UV-Vis spectroscopy?
  • A. It relates absorbance to concentration and path length.
  • B. It describes the scattering of light in a medium.
  • C. It explains the emission spectra of compounds.
  • D. It determines the molecular weight of a substance.
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