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
The maximum number of hydrogen bonds that a molecule of water can have is
  • A
    4
    Correct
  • B
    3
  • C
    2
  • D
    1
2
During the formation of a chemical bond
  • A
    energy of the system does not change
  • B
    energy increases
  • C
    energy decreases
    Correct
  • D
    electron-electron repulsion becomes more than the nucleus-electron attraction
3
Which of the following has maximum number of lone pairs associated with Xe?
  • A
    \({\text{Xe}}{{\text{F}}_{\text{6}}}\)
  • B
    \({\text{Xe}}{{\text{F}}_{\text{2}}}\)
    Correct
  • C
    \({\text{Xe}}{{\text{O}}_{\text{3}}}\)
  • D
    \({\text{Xe}}{{\text{F}}_{\text{4}}}\)
4
The structure of \({\text{I}}{{\text{F}}_{\text{7}}}\)is
  • A
    Trigonal bipyramid
  • B
    Pentagonal bipyramid
    Correct
  • C
    Square pyramid
  • D
    Octahedral
5
The number of types of bonds between two carbon atoms in calcium carbide is
  • A
    One sigma, two pi
    Correct
  • B
    One sigma, one pi
  • C
    Two sigma, two pi
  • D
    Two sigma, one pi
6
The hybridization of orbitals of N atom in\({\text{No}}_3^ - \), \({\text{No}}_2^ + \) and \({\text{N}}{{\text{H}}_{\text{4}}}^ + \)are respectively
  • A
    \({\text{s}}{{\text{p}}^{\text{2}}},{\text{ sp}},{\text{ s}}{{\text{p}}^{\text{3}}}\)
    Correct
  • B
    \({\text{s}}{{\text{p}}^{\text{2}}},{\text{ s}}{{\text{p}}^{\text{3}}},{\text{ sp}}\)
  • C
    \({\text{sp}},{\text{ s}}{{\text{p}}^{\text{2}}},{\text{ s}}{{\text{p}}^{\text{3}}}\)
  • D
    \({\text{sp}},{\text{ s}}{{\text{p}}^{\text{3}}},{\text{ s}}{{\text{p}}^{\text{2}}}\)
7
Among the following the maximum covalent character is shown by the compound
  • A
    \({\text{FeC}}{{\text{l}}_{\text{2}}}\)
  • B
    \({\text{AlC}}{{\text{l}}_{\text{3}}}\)
    Correct
  • C
    \({\text{SnC}}{{\text{l}}_{\text{2}}}\)
  • D
    \({\text{MgC}}{{\text{l}}_{\text{2}}}\)
8
Which one of the following is paramagnetic?
  • A
    NO
    Correct
  • B
    CO
  • C
    \({{\text{N}}_{\text{2}}}\)
  • D
    \({{\text{O}}_{\text{3}}}\)
9
Hybridization of \({{\text{C}}_{\text{2}}}\)and \({{\text{C}}_{\text{3}}}\)of \({{\text{H}}_{\text{3}}}{\text{C }}--{\text{ CH }} = {\text{ C }} = {\text{ CH }}--{\text{ C}}{{\text{H}}_{\text{3}}}\)are
  • A
    \({\text{S}}{{\text{p}}^{\text{2}}}\), Sp
    Correct
  • B
    Sp, \({\text{S}}{{\text{p}}^{\text{3}}}\)
  • C
    \({\text{S}}{{\text{p}}^{\text{2}}},{\text{ S}}{{\text{p}}^{\text{2}}}\)
  • D
    Sp, Sp
10
The \({\text{s}}{{\text{p}}^{\text{3}}}{{\text{d}}^{\text{2}}}\) hybridization of central atom of a molecule would lead to
  • A
    square planar geometry
  • B
    Tetrahedral geometry
  • C
    Octahedral geometry
    Correct
  • D
    Trigonal bipyramidal geometry
11
The state of hybridization of the central atom and the number of lone pairs over the central atom in \({\text{POC}}{{\text{l}}_{\text{3}}}\)are
  • A
    \({\text{ds}}{{\text{p}}^{\text{2}}}\), 1
  • B
    \({\text{s}}{{\text{p}}^{\text{2}}}\), 0
  • C
    sp, 0
  • D
    \({\text{s}}{{\text{p}}^{\text{3}}}\), 0
    Correct
12
When \({{\text{O}}_{\text{2}}}\) is converted into \({{\text{O}}_{\text{2}}}^ + \)
  • A
    paramagnetic character increases
  • B
    paramagnetic character decreases and the bond order increases
    Correct
  • C
    both paramagnetic character and bond order increase
  • D
    bond order decreases
13
Which one of the following conversions involve change in both hybridization and shape?
  • A
    \({\text{C}}{{\text{H}}_{\text{4}}} \to {\text{ }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\)
  • B
    \({\text{B}}{{\text{F}}_{\text{3}}} \to {\text{ B}}{{\text{F}}_{\text{4}}}^--\)
    Correct
  • C
    \({\text{N}}{{\text{H}}_{\text{3}}} \to {\text{ N}}{{\text{H}}_{\text{4}}}^ + \)
  • D
    \({{\text{H}}_{\text{2}}}{\text{O }} \to {\text{ }}{{\text{H}}_{\text{3}}}{{\text{O}}^ + }\)
14
Based on VSEPR theory, the number of 90 degree F — Br — F angles in \({\text{Br}}{{\text{F}}_{\text{5}}}\)is
  • A
    4
  • B
    2
  • C
    0.0
    Correct
  • D
    8
15
The species having pyramidal shape is
  • A
    \({\text{OS}}{{\text{F}}_{\text{2}}}\)
    Correct
  • B
    \({\text{S}}{{\text{O}}_{\text{3}}}\)
  • C
    \({\text{Si}}{{\text{O}}_{\text{3}}}^{{\text{2}}--}\)
  • D
    \({\text{Br}}{{\text{F}}_{\text{3}}}\)