CHM 113M IIT Kanpur General Chemistry Quiz
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Questions and Answers

What is the oxidation number of the central metal ion in the complex [Pt(NH3)BrCl(NO2)]?

  • +2
  • +1
  • +4 (correct)
  • +3

    • What is the oxidation number of the central metal ion in the complex [Co(NH3)4(H2O)Cl]SO4?

  • +3 (correct)
  • +1
  • +4
  • +2

    • How many AgCl precipitates are formed in the reaction [CoIII(NH3)6]Cl3 + 3 AgCl?

  • 2
  • 1
  • 4
  • 3 (correct)

    • What is the oxidation number of the central metal ion in the complex [CoIII(NH3)3Cl3] (neutral)?

    <p>+3</p> Signup and view all the answers

    How many ions are produced in the aqueous solution of the complex [CoIII(NH3)4Cl2]Cl?

    <p>3</p> Signup and view all the answers

    What is the oxidation number of the central metal ion in the complex [Cr(H2O)4Cl2]NO3?

    <p>+3</p> Signup and view all the answers

    Which type of compounds is known for their coordination ability to form complexes?

    <p>Coordination compounds</p> Signup and view all the answers

    What theory is associated with the explanation of the structures and bonding in coordination compounds?

    <p>Crystal Field Theory</p> Signup and view all the answers

    Which process involves the addition of two new ligands to a metal center?

    <p>Oxidative Addition</p> Signup and view all the answers

    What term describes the removal of two ligands from a metal center to form a new compound?

    <p>Reductive Elimination</p> Signup and view all the answers

    Which polymerization process is catalyzed by Ziegler-Natta catalysts?

    <p>Coordination polymerization</p> Signup and view all the answers

    What did Werner call the number of ligands directly bonded to the metal center?

    <p>Coordination number</p> Signup and view all the answers

    Which of the following statements is NOT true about primary valency?

    <p>It is non-directional in nature</p> Signup and view all the answers

    In the complex $[\text{Co}^{\text{III}}(\text{NH}_3)_6]\text{Cl}_3$, what is the coordination number of the cobalt(III) ion?

    <p>6</p> Signup and view all the answers

    Which of the following observations provided evidence for Werner's predictions about the structure of coordination complexes?

    <p>Both electrical conductivity measurements and precipitation reaction data</p> Signup and view all the answers

    Which of the following is NOT a postulate of Werner's theory?

    <p>Secondary valency is directional in nature</p> Signup and view all the answers

    In the complex $\text{Co}^{\text{III}}\text{Cl}_3.6\text{NH}_3$, what is the oxidation number of cobalt?

    <p>+3</p> Signup and view all the answers

    What is the minimum attendance percentage required to participate in the end-semester examination?

    <p>75%</p> Signup and view all the answers

    Which of the following statements is incorrect regarding make-up examinations?

    <p>Make-up examinations are mandatory for all students.</p> Signup and view all the answers

    Which of the following statements regarding the final examination is true?

    <p>The final examination is compulsory to complete the course requirement.</p> Signup and view all the answers

    What is the weightage of the quiz towards the final grade?

    <p>30%</p> Signup and view all the answers

    Which of the following statements is true regarding the lecture notes and course materials?

    <p>They can be accessed from Mookit (<em>HelloIITK</em> portal).</p> Signup and view all the answers

    What is the venue for the lectures?

    <p>L 19</p> Signup and view all the answers

    Which type of isomerism is observed in square planar complexes with [MA2B2 ]n± and [MA2BC]n±?

    <p>Cis-trans isomerism</p> Signup and view all the answers

    What is the correct term for the type of complex that shows geometrical isomerism in the form [M(AB)2]n±?

    <p>Square planar</p> Signup and view all the answers

    How many different ways can the ligands be arranged in a square planar complex of the form [MABCD]n± to give geometrical isomers?

    <p>3</p> Signup and view all the answers

    In an octahedral complex of the type MA4B2, how many isomers are possible?

    <p>2</p> Signup and view all the answers

    Which complex exhibits cis-platin and trans-platin as geometrical isomers?

    <p>[M(AB)2]</p> Signup and view all the answers

    What is the most powerful tool mentioned in the text for detecting stereoisomers?

    <p><strong>Single crystal X-ray diffraction</strong></p> Signup and view all the answers

    Study Notes

    Oxidation Numbers of Metal Ions

    • In the complex [Pt(NH3)BrCl(NO2)], the oxidation number of the central metal ion, Pt, is +2.
    • In the complex [Co(NH3)4(H2O)Cl]SO4, the oxidation number of Co is +3.
    • The complex [CoIII(NH3)3Cl3] has an oxidation number of +3 for the central metal ion, Co.
    • For the complex [Cr(H2O)4Cl2]NO3, the oxidation number of the central metal ion, Cr, is +3.

    Precipitation and Ionic Products

    • In the reaction [CoIII(NH3)6]Cl3 + 3 AgCl, three AgCl precipitates are formed.
    • The complex [CoIII(NH3)4Cl2]Cl produces 5 ions in aqueous solution.

    Coordination Compounds and Theories

    • Compounds known for their coordination ability to form complexes include transition metals and certain ligands.
    • Crystal Field Theory is associated with the explanation of structures and bonding in coordination compounds.

    Ligand Addition and Removal

    • The addition of two new ligands to a metal center is described as coordination or chelation.
    • The term for the removal of two ligands from a metal center to form a new compound is ligand dissociation.

    Polymerization and Catalysts

    • Ziegler-Natta catalysts catalyze the polymerization process of alkenes.

    Coordination Number and Werner's Theory

    • The number of ligands directly bonded to the metal center is referred to as the coordination number, a term defined by Alfred Werner.
    • In the complex [Co^{III}(\text{NH}_3)_6]\text{Cl}_3, the coordination number of the cobalt(III) ion is 6.
    • Observations of color changes in complexes provided evidence for Werner's predictions about the structure of coordination complexes.

    Isomerism

    • Square planar complexes with [MA2B2]n± and [MA2BC]n± exhibit geometrical isomerism.
    • The correct term for complexes showing geometrical isomerism in the form [M(AB)2]n± is "bidentate ligands."
    • For a square planar complex of the form [MABCD]n±, there are three different ways to arrange the ligands to give geometrical isomers.
    • In an octahedral complex of the type MA4B2, up to 6 isomers are possible.
    • The complexes cis-platin and trans-platin are examples that exhibit geometrical isomerism.

    Examination and Course Requirements

    • Minimum attendance percentage required for end-semester examination is typically 75%.
    • Makeup examinations usually have specific criteria for eligibility and are generally held on predetermined dates.
    • Final examination weightage varies by course structure, typically ranging from 50-70%.
    • Lecture notes and course materials need to be distributed to students for effective study preparation.
    • Lectures are usually conducted in designated classrooms or lecture halls.

    Key Tools for Stereoisomer Detection

    • The most powerful tool for detecting stereoisomers is Nuclear Magnetic Resonance (NMR) spectroscopy.

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    Test your knowledge on inorganic and organic chemistry topics covered by Dr. Prakash Chandra Mondal and Dr. Ramkrishna Sarkar at IIT Kanpur. Quiz content may include lectures, course materials, and examination details.

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