Chromatographic Techniques for Separating Benzene, Phenol, and Aniline
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Questions and Answers

Which physical properties can be used to separate benzene, phenol, and aniline?

  • Crystallization, solubility, density
  • Freezing point, density, molecular weight
  • Molecular weight, boiling point, freezing point (correct)
  • Boiling point, crystallization, solubility

    • What is the purpose of preparative chromatography?

  • To analyze the physical properties of a compound
  • To purify enough of a substance (correct)
  • To separate mixtures in the laboratory
  • To determine the chemical composition of a sample

    • What is the principle on which chromatography is usually based?

  • Partition of solute between two phases (correct)
  • Evaporation of solute from a mixture
  • Crystallization of solute from a solution
  • Diffusion of solute in a solvent

    • Which technique is used when the mobile phase is a gas?

    <p>Gas chromatography</p> Signup and view all the answers

    What distinguishes the reactivity of phenol and aniline towards another reagent?

    <p>-OH and NH2 functional groups</p> Signup and view all the answers

    What is the purpose of analytical chromatography?

    <p>To determine the chemical composition of a sample</p> Signup and view all the answers

    In liquid chromatography, what is the main factor responsible for the separation of a sample into its individual parts?

    <p>The interactions of the sample with the mobile and stationary phases</p> Signup and view all the answers

    What is the most popular chromatography technique for separating a mixture in liquid chromatography?

    <p>Liquid solid column chromatography</p> Signup and view all the answers

    In paper chromatography, what forms the stationary phase?

    <p>The aqueous component of the solvent binding to cellulose paper</p> Signup and view all the answers

    What is the principle of paper chromatography?

    <p>Separating and identifying both colored and colorless mixtures</p> Signup and view all the answers

    What is the main factor responsible for the separation of a sample in liquid solid column chromatography?

    <p>The interactions of the sample with the mobile and stationary phases</p> Signup and view all the answers

    Which type of paper chromatography involves the solvent running up the paper by capillary action?

    <p>Ascending Paper Chromatography</p> Signup and view all the answers

    What component of the solvent forms the mobile phase in paper chromatography?

    <p>The organic component migrating through the paper</p> Signup and view all the answers

    Which factor plays a key role in determining the effluent concentration in a chromatogram?

    <p>The retention time or volume when a solute exits the injector and passes through the column and detector</p> Signup and view all the answers

    What does liquid solid column chromatography feature as its mobile phase?

    <p>A liquid mobile phase slowly filtering down through a solid stationary phase</p> Signup and view all the answers

    In liquid chromatography, what determines effluent concentration in a chromatogram?

    <p>The retention time or volume when a solute exits the injector and passes through the column and detector</p> Signup and view all the answers

    Chromatography is a laboratory technique used for mixing substances together.

    <p>False</p> Signup and view all the answers

    The principle of chromatography is based on the partition of solute between two phases.

    <p>True</p> Signup and view all the answers

    Gas chromatography uses a liquid mobile phase.

    <p>False</p> Signup and view all the answers

    Paper chromatography involves the solvent running down the paper by capillary action.

    <p>False</p> Signup and view all the answers

    Analytical chromatography is used to purify enough of a substance.

    <p>False</p> Signup and view all the answers

    Physical properties such as molecular weight and boiling point cannot be used to separate benzene, phenol, and aniline.

    <p>False</p> Signup and view all the answers

    Liquid chromatography is a technique used to separate a sample into its individual parts, and this separation occurs based on the interactions of the sample with the mobile phase only.

    <p>False</p> Signup and view all the answers

    In liquid solid column chromatography, the mobile phase slowly filters up through the solid stationary phase, bringing the separated components with it.

    <p>False</p> Signup and view all the answers

    Ascending paper chromatography involves the solvent running down the paper by capillary action.

    <p>False</p> Signup and view all the answers

    In paper chromatography, the aqueous component of the solvent forms the mobile phase.

    <p>False</p> Signup and view all the answers

    Paper chromatography is a technique used to separate a sample into its individual parts based on the interactions of the sample with the stationary phase only.

    <p>False</p> Signup and view all the answers

    The retention time or volume in chromatography is when a solute enters the injector and passes through the column and the detector.

    <p>True</p> Signup and view all the answers

    Liquid solid column chromatography is classified based on the physical states of the mobile and stationary phases.

    <p>False</p> Signup and view all the answers

    The solvent in paper chromatography binds to the cellulose paper to form the stationary phase.

    <p>True</p> Signup and view all the answers

    Paper chromatography can be used to separate and identify both colored and colorless mixtures.

    <p>True</p> Signup and view all the answers

    Liquid chromatography is a technique used to separate a sample into its individual parts based on the interactions of the sample with only the stationary phase.

    <p>False</p> Signup and view all the answers

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