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Questions and Answers

Which of the following molecules has the strongest bond?

  • C = N
  • C = O
  • C = C
  • N = O (correct)

    • What is the correct statement about molecular stability?

  • Molecule is unstable if Nb is greater than Na
  • Molecule is stable if Na is greater than Nb
  • Molecule is stable if Nb is greater than Na (correct)
  • Molecule is unstable if Na is equal to Nb

    • How many electrons are involved in the formation of a nitrogen molecule?

  • 3
  • 6
  • 8 (correct)
  • 4

    • Which statement is correct about bond order?

    <p>Bond order increases the stability of a molecule</p> Signup and view all the answers

    What is the correct statement about molecular orbitals?

    <p>Molecular orbitals are the result of the overlap of atomic orbitals</p> Signup and view all the answers

    What is the correct statement about chemical reactions?

    <p>Chemical reactions involve the breaking of bonds</p> Signup and view all the answers

    Which of the following is not a characteristic of a stable molecule?

    <p>Low bond order</p> Signup and view all the answers

    What is the correct statement about ionization energy?

    <p>Ionization energy increases with increasing atomic number</p> Signup and view all the answers

    What is the correct molecular orbital representation for a molecule?

    <p>Option 1: (σ 1s2) (σx 1s2) (σ2s2) (σx2s2) (σ2pz2) (π2px2)</p> Signup and view all the answers

    Which of the following species has the highest ionization energy?

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

    What is the correct order of solubility of the given sulfates?

    <p>BeSO4 &gt; MgSO4 &gt; CaSO4 &gt; SrSO4 &gt; BaSO4</p> Signup and view all the answers

    Which of the following species has the highest electron affinity?

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

    What is the correct molecular orbital representation for a molecule?

    <p>Option 2: (σ 1s2) (σx 1s2) (σ2s2) (σx2s2) (π2px2 = π2py2)</p> Signup and view all the answers

    Which of the following species shows the highest acidic nature?

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

    What is the correct order of solubility of the given sulfates?

    <p>BeSO4 &gt; MgSO4 &gt; CaSO4 &gt; SrSO4 &gt; BaSO4</p> Signup and view all the answers

    Which of the following species has the highest ionization energy?

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

    Which theory explains the geometry of a molecule?

    <p>V.S.E.P.R. theory</p> Signup and view all the answers

    Which of the following orbitals do not participate in hybridization?

    <p>4s</p> Signup and view all the answers

    Which species shows different bond lengths?

    <p>PCl5</p> Signup and view all the answers

    Which species does not show 2s-2p mixing?

    <p>F2</p> Signup and view all the answers

    Which species shows electrostatic force?

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

    What is the main reason for the formation of a molecular bond?

    <p>Electrostatic attraction</p> Signup and view all the answers

    Which of the following molecules has a tetrahedral shape?

    <p>CH4</p> Signup and view all the answers

    What is the result of the hybridization of atomic orbitals?

    <p>Formation of molecular orbitals</p> Signup and view all the answers

    Study Notes

    Molecular Geometry and Bonding

    • Octet theory explains the geometry of molecules.
    • VSEPR (Valence Shell Electron Pair Repulsion) theory is used to predict the shape of molecules.

    Hybridization

    • In hybridization, orbitals mix to form new hybrid orbitals that are used to form bonds.
    • The orbitals involved in hybridization are s, p, and d orbitals.
    • The type of hybridization depends on the molecule and the number of electron pairs.

    Bond Length

    • PCl5 and SF6 have different bond lengths due to differences in their molecular geometry.
    • The bond length of a molecule depends on the electrostatic forces between the atoms.

    2s-2p Mixing

    • 2s-2p mixing occurs in molecules where the s and p orbitals mix to form hybrid orbitals.
    • B2, C2, N2, and O2 are examples of molecules that exhibit 2s-2p mixing.

    Electrostatic Forces

    • Electrostatic forces are responsible for the attraction between ions in ionic compounds.
    • NaCl, H2O, and HF are examples of molecules that exhibit electrostatic forces.

    Molecular Orbital Theory

    • Molecular Orbital (MO) theory is used to describe the bonding in molecules.
    • MO theory combines atomic orbitals to form molecular orbitals that describe the bonding and antibonding interactions.

    Electron Affinity

    • Electron affinity is the energy change when an electron is added to an atom or molecule.
    • The electron affinity of an atom or molecule is related to its electronegativity.

    Solubility

    • The solubility of a compound depends on the strength of the electrostatic forces between the ions.
    • The solubility of a compound can be predicted based on the type of bonding and the electronegativity of the atoms.

    Acid-Base Chemistry

    • Acid-base chemistry is based on the transfer of electrons or protons between molecules.
    • The acidity of a molecule depends on the electronegativity of the atoms and the type of bonding.

    Bond Strength

    • The strength of a bond depends on the electronegativity of the atoms and the type of bonding.
    • The bond strength of a molecule can be predicted based on the type of bonding and the electronegativity of the atoms.

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