Quiz  /  Chemical Bonding Molecular Structure Class 12 MCQ Questions With...

  • 1. 
    Water, H2O has molar mass 18 gmol-1 and boils at 373K while ethanol, C2H5OH has molar mass 46 gmol-1 and boils at 351K.Which is/are the correct explanation for the above statement?

  • H2O can form more H-bond compare to ethanol.
  • Both molecules are polar molecules with H-bond
  • Ethanol can only form dipole-dipole forces
  • Both A & B

  • 2. 
    If Bromine bonds with Hydrogen, a ____________ bond forms.

  • polar covalent
  • nonpolar covalent
  • metallic
  • ionic

  • 3. 
    The polarity of a bond between two elements can be best determined by

  • The difference in electronegativity between the elements
  • The difference in first ionization energy between the elements
  • The number of electrons shared in the bond
  • The difference in atomic radius between the elements

  • 4. 
    What is the molecular shape of CH3Cl?

  • trigonal pyramidal
  • trigonal bipyramidal
  • tetrahedral
  • not enough information

  • 5. 
    In scientific terms, anything that represents something else, whether it's physical or conceptual, is called a ___

  • theory
  • model
  • hypothesis
  • chemical bond

  • 6. 
    In reality, the only thing connecting two atoms together in a chemical bond is a bunch of ___

  • electrons
  • protons
  • photons
  • neutrons

  • 7. 
    What usually forms the positive ion?

  • Metal
  • Nonmetals
  • None

  • 8. 
    Is this molecule polar or nonpolar?

  • polar
  • nonpolar

  • 9. 
    What is a valence electron?

  • an electron that is found in the outermost shell of an atom.
  • an electron found in the innermost shell of an atom.
  • an electron found in the middle shell.
  • All of above

  • 10. 
    What is the electron configuration of beryllium?

  • 2.2
  • 2.4
  • 4
  • 6

  • 11. 
    Which compound will form when aluminum bonds with chlorine?

  • Al3Cl
  • AlCl
  • AlCl3
  • Al7Cl3

  • 12. 
    Two atoms in a molecule have exactly the same electronegativity values. Which of the following best describes the bond that they form and why?

  • an ionic bond forms because electrons will be transferred from one atom to another
  • a nonpolar covalent bond because electrons will be shared between the atoms equally
  • a polar covalent bond because electrons will be shared between the atoms unequally
  • a metallic bond because delocalized electrons will move between the nuclei

  • 13. 
    What is the AXE Notation for SeO3?

  • AX3E0
  • AX3E1
  • AX3E2
  • AX3E3

  • 14. 
    CO2 has polar bonds but is a NON POLAR molecule. Why?

  • it has an asymmetrical shape
  • bond polarity or dipole moment between C and O atoms cancel
  • there is net dipole moment between C and O atoms in molecule
  • bond polarity does not exist between C+ and O- atoms

  • 15. 
    Intermolecular forces present between HCl molecules is

  • dipole-dipole interaction
  • dispersion forces
  • Hydrogen bond
  • covalent bond

  • 16. 
    Which element will have 5 electrons in its Lewis dot symbol?

  • Bromine
  • Nitrogen
  • Neon
  • Boron

  • 17. 
    A 2D model that represents covalent bonds as lines and unbonded electrons as dots is called ___

  • a space-filling model
  • a line structural formula
  • a ball-and-stick model
  • a Lewis structure

  • 18. 
    What molecule has a trigonal planar geometry?

  • hydrogen peroxide
  • methane
  • boron trifluoride
  • carbon dioxide

  • 19. 
    Covalent bonding is between a

  • nonmetal and nonmetal
  • metal and nonmetal
  • metal and metal
  • It depends on the situation

  • 20. 
    Molecular nitrogen is really hard to break up because it has ___

  • a triple bond
  • a lone pair on each atom
  • 14 electrons
  • a quadruple covalent bond

  • 21. 
    The chemical formula of iron (III)bromide is

  • FeBr
  • Fe(III)Br
  • FeBr₃
  • Fe₂Br₃

  • 22. 
    The ability of an atom in a molecule to attract electrons is best quantified by the ______.

  • electronegativity
  • paramagnetism
  • diamagnetism
  • first ionization energy

  • 23. 
    What are isoelectronic species?

  • same number of electrons
  • same number of neutrons
  • same number of protons
  • All the above

  • 24. 
    Which of the following molecules is not an exception to octet rule?

  • BF3
  • PF5
  • CO2
  • IF7

  • 25. 
    Which of the following is a nonpolar covalent molecule?

  • carbon tetrachloride
  • hydrogen chloride
  • copper (II) sulfate
  • sodium hydroxide

  • 26. 
    Which of the following pair is expected to have the same bond order?

  • O2 , N2
  • O2+, N2–
  • O2 – , N2+
  • O2–, N2–

  • 27. 
    If an atom gains three electrons what charge will it have?

  • +3
  • -1
  • +1
  • -3

  • 28. 
    Ionic Bonding involves...

  • The transfer of protons
  • The transfer of nuetrons
  • The transfer of electrons
  • None Of the above

  • 29. 
    Which of the following molecule is T shaped?

  • SF4
  • ClF3
  • H2O
  • NH3
Report Question
warning
access_time
  Time