9th Class Chemistry Chapter 4 Structure of Molecules Important Short Questions 2024

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Class 9 Chemistry Chapter 4 Notes

Post TopicShort Questions
Book CodeChemistry
Class9th Class
Chapter/FullChapter 4
BoardPunjab Board

9th Class Chemistry Chapter 4 Structure of Molecules Short Questions

  • Atoms of different elements react to attain a noble gas configuration, which is stable.
  • Chemical bonds may be formed by complete transfer of electrons (ionic); mutual sharing (covalent) or by donation from an atom(coordinate or dative covalent).
  • Metals have the tendency to lose electrons easily forming cations.
  • Non-metals have a tendency to gain electrons and form anions.
  • In ionic bonding, a strong electrostatic force holds ions together.
  • Ionic compounds are solids with high melting and boiling points.
  • Covalent bonds among non-metals are weaker than ionic bonds.
  • Ionic bonds are non-directional, but covalent bonds are formed in a particular direction.
  • Covalent bonds formed between similar atoms are non-polar while between different atoms are polar.
  • In covalent bonding single, double, or triple covalent bond is formed by sharing of one, two, or three electron pairs by the bonded atoms.
  • A coordinate covalent bond is formed between electron pair donors and electron pair acceptors.
  • The metallic bond is formed between metal atoms due to free electrons.
  • In addition to chemical bonds, intermolecular forces of attraction exist between polar molecules.
  • Hydrogen bonding exists between the hydrogen atom of one molecule and the highly electronegative atom of another molecule.
  • Hydrogen bonds affect the physical properties of the compounds.
  • The properties of the compounds depend upon the nature of bonding present in the compound.
  • Ionic compounds are crystalline solids with high melting and boiling points.
  • Covalent compounds exist in molecular form in three physical states.
  • Polar and non-polar covalent compounds have different properties.
  • Metals have shining surfaces. They are good conductors of electricity and are malleable and ductile.
  • Why do atoms react?
  • Why is the bond between an electropositive and an electronegative atom ionic in nature?
  • Ionic compounds are solids. Justify.
  • More electronegative elements can form bonds between themselves. Justify.
  • Metals are good conductors of electricity. Why?
  • Ionic compounds conduct electricity in solution or molten form. Why?
  • What type of covalent bond is formed in nitrogen molecules?
  • Differentiate between lone pair and bond pair of electrons.
  • Describe at least two necessary conditions for the formation of a covalent bond.
  • Why HC1 has dipole-dipole forces of attraction?
  • What is a triple covalent bond, explain with an example.
  • What is the difference between polar and non-polar covalent bonds, explain with one example of each.
  • Why does a covalent bond become polar?
  • What is the relationship between electronegativity and polarity?
  • Why does ice float on water?
  • Give the characteristic properties of ionic compounds.
  • What characteristic properties do the covalent compound have?

Chemistry Chapter 4 Short Questions PDF Download

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Chemistry Chapter 4 Short Questions


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