Introduction to Qualitative Analysis of Anions Quiz
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Questions and Answers

What type of tests are performed to confirm the presence or absence of anions in the analysis?

  • Titration tests and precipitation tests
  • Color tests and pH testing
  • Elimination tests and spot testing (correct)
  • Boiling tests and fusion tests

    • Why are spot tests directly made for most anions?

  • Anions are highly reactive
  • Anions are sufficiently different from each other (correct)
  • Most anions are similar to each other
  • Anions do not react with spot test reagents

    • What is the primary purpose of the dry heating test in identifying anions?

  • To confirm the presence of metallic ions
  • To provide important information about the acid radical present (correct)
  • To eliminate cations from the solution
  • To precipitate cations as oxides

    • Why are anions tested individually rather than by a systematic method according to the text?

    <p>Better results are achieved by individual testing</p> Signup and view all the answers

    What must be done before preparing a solution with sodium carbonate according to the text?

    <p>Test for hydroxides and carbonates</p> Signup and view all the answers

    Why do we first remove all traces of metallic ions except Na, K, and NH4 before further testing?

    <p>To avoid interference with anion analysis</p> Signup and view all the answers

    What is the primary purpose of anion analysis?

    <p>To determine the presence of negatively charged particles in a given sample</p> Signup and view all the answers

    Which of the following is NOT an example of a monatomic anion?

    <p>Nitrate (NO₃⁻)</p> Signup and view all the answers

    What is the general scheme used to divide anions into groups during anion analysis?

    <p>Based on whether they give a gas or volatile product with HCl, their solubility with silver, barium, and calcium salts, and whether they are reducing or oxidizing agents</p> Signup and view all the answers

    What is the purpose of performing a dry heating test during anion analysis?

    <p>To observe the evolution of gases or volatile products upon heating</p> Signup and view all the answers

    Which of the following preliminary tests is NOT typically performed before anion analysis?

    <p>Flame test</p> Signup and view all the answers

    Which of the following anions is classified as a halogen?

    <p>Chloride (Cl⁻)</p> Signup and view all the answers

    Which group of anions will give volatile products or precipitate with HCl?

    <p>Group A</p> Signup and view all the answers

    Which anion forms an insoluble product with CaCl2 in HAc?

    <p>C2O4</p> Signup and view all the answers

    Which of the following anions will give a precipitate with BaCl2 in Ammonium Hydroxide?

    <p>PO4</p> Signup and view all the answers

    What is the group of anions that form insoluble products with AgNO3 in Nitric Acid?

    <p>Group C</p> Signup and view all the answers

    Which of the following anions gives a precipitate soluble in 0.25 M NH4OH?

    <p>[Fe(CN)6]-4</p> Signup and view all the answers

    Anions that will give volatile products include all of the following except:

    <p>[Fe(CN)6]-4</p> Signup and view all the answers

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