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Chemistry Quiz Questions
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Chemistry Quiz Questions

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@NavigableMilwaukee

Questions and Answers

What is the purpose of adding ammonium chloride before adding ammonium hydroxide in the precipitation of the iron group (III) in qualitative analysis?

  • To decrease the concentration of –OH ions (correct)
  • To prevent interference by phosphate ions
  • To increase the concentration of Cl– ions
  • To increase the concentration of NH4+ ions

    • What is the correct sequence of ligands in the order of decreasing field strength?

  • CO > H2O > S2− > F−
  • CO > H2O > F− > S2− (correct)
  • OH > F− > CO > S2−
  • CO > F− > H2O > S2−

    • What is the correct decreasing order of basic strength of the conjugate bases CH2Br, NaOH, RO, CH3COO, and Cl?

  • RO > OH > CH3COO > Cl
  • OH > RO > CH3COO > Cl (correct)
  • RO > CH3COO > OH > Cl
  • Cl > OH > RO > CH3COO

    • What is the pressure of H2 (in bar) required to make the emf of a hydrogen electrode zero in pure water at 25°C?

    <p>10−14</p> Signup and view all the answers

    What is the correct order of ligands in the order of decreasing field strength?

    <p>NCS− &gt; EDTA4− &gt; CN− &gt; CO</p> Signup and view all the answers

    What is the role of ammonium hydroxide in qualitative analysis?

    <p>To precipitate the iron group (III)</p> Signup and view all the answers

    What is the effect of adding HBr to the ether?

    <p>It undergoes a substitution reaction</p> Signup and view all the answers

    What is the relationship between A and C in the given reaction?

    <p>A is a reactant and C is a product</p> Signup and view all the answers

    What is the identity of B and C in the given reaction?

    <p>B is HBr and C is CH2OH</p> Signup and view all the answers

    What is the type of mechanism step involved in the given reaction?

    <p>Electrophilic substitution</p> Signup and view all the answers

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