Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 1K views

    Competency Based Questions

    Uploaded by

    Mind On You tube
    The document contains 17 competency-based questions on chemical bonding and molecular structure. The questions cover topics such as ionic vs covalent bonding, solubility, boiling points, paramagnetism, bond lengths, molecular orbital theory, hybridization, and dipole moments. Explanations are sought for trends and differences in the properties of various substances based on their electronic structures and bonding configurations.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Competency Based Questions

    Uploaded by

    Mind On You tube
    1K views2 pages
    The document contains 17 competency-based questions on chemical bonding and molecular structure. The questions cover topics such as ionic vs covalent bonding, solubility, boiling points, paramagnetism, bond lengths, molecular orbital theory, hybridization, and dipole moments. Explanations are sought for trends and differences in the properties of various substances based on their electronic structures and bonding configurations.

    Original Description:

    Question

    Original Title

    5. Competency Based Questions

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    The document contains 17 competency-based questions on chemical bonding and molecular structure. The questions cover topics such as ionic vs covalent bonding, solubility, boiling points, paramagnetism, bond lengths, molecular orbital theory, hybridization, and dipole moments. Explanations are sought for trends and differences in the properties of various substances based on their electronic structures and bonding configurations.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    1K views2 pages

    Competency Based Questions

    Uploaded by

    Mind On You tube
    The document contains 17 competency-based questions on chemical bonding and molecular structure. The questions cover topics such as ionic vs covalent bonding, solubility, boiling points, paramagnetism, bond lengths, molecular orbital theory, hybridization, and dipole moments. Explanations are sought for trends and differences in the properties of various substances based on their electronic structures and bonding configurations.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    You are on page 1of 2

    Competency Based Questions

    Chemical Bonding and Molecular


    Structure

    1. Anhydrous AlCl3 is covalent but AlCl3.6H2O is ionic in nature. How


    would you account for this?

    2. Cu+ and Na+ are of same size but CuCl is insoluble while NaCl is
    soluble in water. Explain.

    3. Which one has high boiling point and why?

    Ethyl alcohol or dimethyl ether.

    4. Nitrogen dioxide (NO2) is paramagnetic at room temperature.


    When a sample of the gas is cooled below 0oC, its molecular
    weight increases and it loses its paramagnetism. When it is
    reached, the behavior is reversed.

    (i) Using electron dot structure, write an equation which accounts


    for these observations.

    (ii) How does this phenomenon differ from resonance?

    5. Explain the observations that the bond length in N2+ is 0.02Å larger
    than in N2 while the bond length in NO+ is 0.09Å less than in NO.

    6. Which of the following combinations of orbitals are allowed in


    LCAO method (considering z-axis to be molecular axis) and sketch
    the shapes of MOs formed by their addition and subtraction:

    (i) s and pz (ii) px and px (iii) pz and py (iv) s and px

    7. Explain why o-hydroxy benzaldehyde is a liquid at room


    temperature while p hydroxyl benzaldehyde is a high melting solid.

    8. Which of the following has higher dipole moment and why?

    1-Butene or 1-Butyne
    9. Bond angle in PH4+ is higher than PH3 .Why?

    10. BeF2 is linear while SF2 is angular though both are tri-atomic. Why?

    11. Explain why the melting point of NaCl is higher than AlCl3 ?

    12. Elements X, Y and Z have 4, 5 and 7 valence electrons


    respectively.

    (i) Write the molecular formula of the compounds formed by these


    elements individually with Hydrogen.

    (ii) Which of these compounds will have the highest dipole


    movement?

    13. XeF2 molecule is linear molecule but it is SP3d hybridized. Why?

    14. Why does PCl5 exist as [ PCl4 ]+[ PCl6 ]- in the crystalline state?

    15. Why He2 molecule does not exist?

    16. Which of the following has the higher dipole movement and Why?

    NH3 or NF3

    17. Silver halides have low solubilities in water as compared to alkali


    metals halides. Explain.

    You might also like