CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure MCQs


Question: The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a

  • a) chemical bond
  • b) ionic bond
  • c) chemical compound
  • d) covalent bond

Answer: chemical bond


Question: The evolution of various theories of valence and the interpretation of the nature of chemical bonds have closely been related to the developments in the understanding of

  • a) All of the above
  • b) periodic table
  • c) electronic configuration of elements
  • d) structure of atom

Answer: All of the above


Question: Who provide explanation of valence based on intertness of noble gases ?

  • a)

  • b) Sidgwick & Powell
  • c) Lewis
  • d) Langmuir



Question: In the formation of a molecule which of the following take part in chemical combination?

  • a) valence electron
  • b) cation
  • c) anion
  • d) inner shell electron

Answer: valence electron


Question: The bond formed as a result of the electrostatic attraction between the positive and negative ions is termed as ...

  • a) Electrovalent bond
  • b) Covalent bond
  • c) Chemical bond
  • d) Co-ordinate bond

Answer: Electrovalent bond


Question: Cation and anion combines in a crystal to form following type of compound

  • a) ionic
  • b) covalent
  • c) metallic
  • d) dipole-dipole

Answer: ionic


Question: Electrovalence of calcium and chlorine respectively is

  • a) + 2, – 1
  • b) 1, – 2
  • c) + 1, – 1
  • d) + 2, – 2

Answer: + 2, – 1


Question: When a metal atom combines with non-metal atom, the non-metal atom will

  • a) gain electrons and increase in size
  • b) gain electrons and increase in size
  • c) lose electrons and increase in size
  • d) lose electrons and decrease in size

Answer: gain electrons and increase in size


Question: In N2 molecule, the number of electrons shared by each nitrogen atom is

  • a) 3
  • b) 2
  • c) 5
  • d) None of these

Answer: 3


Question: The lowest energy structure is the one with the ______ formal charges on the atoms.

  • a) smallest
  • b) highest
  • c) zero
  • d) negative

Answer: smallest


More Questions................


Question: In the cyanide ion, the formal negative charge is on

  • a) N
  • b) C
  • c) Both C and N
  • d) Resonate between C and N

Answer: N


Question: What are the exceptions of the octet rule ?

  • a) All of these
  • b) Expanded octet of the central atom
  • c) An odd number of electrons on central atom
  • d) The incomplete octet of central atom

Answer: All of these


Question: In which of the following molecules octet rule is not followed?

  • a) NO
  • b) CH4
  • c) NH3
  • d) CO2

Answer: NO


Question: Among the following the electron deficient compound is

  • a) BCl3
  • b) PCl5
  • c) CCl4
  • d) BeCl2

Answer: BCl3


Question: Which of the following is the electron deficient molecule?

  • a) B2H6
  • b) PH3
  • c) SiH4
  • d) None of these

Answer: B2H6


Question: Which of the following compounds does not follow the octet rule for electron distribution?

  • a) PCl5
  • b) H2O
  • c) PH3
  • d) PCl3

Answer: PCl5


Question: Which of the following pairs will form the most stable ionic bond ?

  • a) Mg and F
  • b) Na and F
  • c) Na and Cl
  • d) Li and F

Answer: Mg and F


Question: Which of the following methods is used for measuring bond length ?

  • a) All of these
  • b) Spectroscopic techniques
  • c) Electron-diffraction
  • d) X-ray diffraction

Answer: All of these


Question: _______ is measured as the radius of an atom’s core which is in contact with the core of an adjacent atom in a bonded situation.

  • a) Covalent radius
  • b) Ionic radius
  • c) Bond length
  • d) van der Waal’s radius

Answer: Covalent radius


Question: All the bond lengths of sulphur – oxygen in sulphate ion, are equal because of:

  • a) resonance
  • b) symmetry
  • c) high electronegativity of oxygen
  • d) None of these

Answer: resonance




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