CBSE  /  Class 11  /  Chemistry  /  Chemical Bonding and Molecular Structure

  • 1. 
    The number of types of bonds between two carbon atoms in calcium carbide is

  • Two sigma, two pi
  • One sigma, two pi
  • One sigma, one pi
  • Two sigma, one pi

  • 2. 
    Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?

  • RbCl
  • KCl
  • NaCl
  • LiCl

  • 3. 
    Dipole-induced dipole interactions are present in which of the following pairs?

  • H
  • Cl
  • HCl and He atoms
  • SiF

  • 4. 
    Among the following mixtures, dipole-dipole as the major interaction, is present in

  • benzene and ethanol
  • acetonitrile and acetone
  • KCl and water
  • benzene and carbon tetrachloride

  • 5. 
    The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing order of the polarizing power of the cationic species, K, Ca, Mg, Be?

  • Ca< Mg< Be< K
  • Mg< Be< K< Ca
  • Be< K< Ca< Mg
  • K< Ca< Mg< Be

  • 6. 
    The species having pyramidal shape is

  • SO3
  • BrF3
  • SiO32-
  • OSF2

  • 7. 
    The structure of IF

  • Pentagonal bipyramid
  • Square pyramid
  • Trigonal bipyramid
  • Octahedral

  • 8. 
    The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent sp² orbitals. The total number of sigma (s) and pi (p) bonds in ethene molecule is

  • 1 sigma (s) and 2 pi (p) bonds
  • 3 sigma (s) and 2 pi (p) bonds
  • 4 sigma (s) and 1 pi (p) bonds
  • 5 sigma (s) and 1 pi (p) bonds

  • 9. 
    Which of the following is a linear molecule?

  • ClO
  • CO
  • NO
  • SO
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