Chemical Bonding And Molecular Structure CBSE Questions & Answers

Chemical Bonding And Molecular Structure

This is Chemistry Class 11 Chemical Bonding and Molecular Structure CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories
  • A
    Valence Shell Electron Pair Repulsion VSEPR Theory
  • B
    Valence Bond (VB) Theory
  • C
    Molecular Orbital (MO) Theory
  • D
    Lewis approach
    Correct
2
Inertness of noble gas was observed to be due to their electronic configurations: Choose the most appropriate
  • A
    Atomic mass is low so they are stable
  • B
    Outermost orbitals of the noble gases are fully filled
    Correct
  • C
    Total number of electrons in the outermost shell is duplets
  • D
    Noble gases form ions to complete their outermost orbitals
3
Stable outer octet of electrons is achieved in chlorine atom during the formation of NaCl by:
  • A
    The formation of a hybrid orbital
  • B
    The formation of a coordinate bond
  • C
    The loss of an electron
    Correct
  • D
    The gain of an electron
4
The bond formed, as a result of the electrostatic attraction between the positive and negative ions was termed as
  • A
    electrovalent bond
    Correct
  • B
    single covalency
  • C
    coordinate b
  • D
    covalent bond
5
The number of dots around the Lewis symbols for the elements represent
  • A
    coordinate valency
  • B
    the number of valence electrons of the element
    Correct
  • C
    group valence of the element
  • D
    electrovalency
6
The formation of the Cl2 molecule can be understood in terms of the sharing of a pair of electrons between the two chlorine atoms, each chlorine atom contributing one electron to the shared pair. Choose the most appropriate name of the bond that is formed
  • A
    ionic bond
  • B
    a single covalent bond
    Correct
  • C
    multiple bond
  • D
    double bond
7
When a gas phase atom in its ground state gains an electron. This is called
  • A
    Electron affinity
  • B
    lattice enthalpy
  • C
    electron gain enthalpy
    Correct
  • D
    ionization enthalpy
8
788 kJ of energy is required to separate one mole of solid NaCl into one mole of \({\text{N}}{{\text{a}}^ + }\) (g) and one mole of \({\text{C}}{{\text{l}}^ - }\) (g) to an infinite distance. This process explains
  • A
    lattice enthalpy
    Correct
  • B
    ionization enthalpy
  • C
    electron gain enthalpy
  • D
    Electron affinity
9
A qualitative measure of the stability of an ionic compound is provided
  • A
    ionization enthalpy
  • B
    lattice enthalpy
    Correct
  • C
    Electron affinity
  • D
    electron gain enthalpy
10
bond lengths are lower in elements having
  • A
    crystal structure
  • B
    single bond
    Correct
  • C
    triple bond
  • D
    double bond
11
Bond angle helps us in
  • A
    determining molecular size
  • B
    determining the reactivity of the element
  • C
    determining molecular shape
    Correct
  • D
    determining the stability of the element
12
The amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state is called
  • A
    ionization enthalpy
  • B
    Electron affinity
  • C
    bond enthalpy
    Correct
  • D
    lattice enthalpy
13
H.O.H bond angle in water is
  • A
    \({\text{24}}{0^0}\)
  • B
    \({\text{41}}{{\text{6}}^0}\)
  • C
    \({\text{1}}0{{\text{4}}^0}\)
    Correct
  • D
    \({\text{11}}{0^0}\)
14
For \({{\text{N}}_{\text{2}}}\), bond order is
  • A
    2
  • B
    4
  • C
    1
  • D
    3
    Correct
15
\({{\text{N}}_{\text{2}}}\), CO and \({\text{N}}{{\text{O}}^ + }\) are isoelectronic molecules. Their respective bond order is :
  • A
    3,3,3
    Correct
  • B
    1,1,3
  • C
    2,3,3
  • D
    2,3,4