Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Lesson: Hybridization of Main-Group Elements

Worksheet • 11 Questions

Q1:

A molecule of biotin (vitamin B7) contains two N atoms, one S atom, and two C O double bonds:

C H C C H H H C C H H C H H H S C O O C C N H H H H H N H C H O

What is the hybridization of the S atoms?

  • Asp3
  • Bsp3d2
  • Csp
  • Dsp3d
  • Esp2

What is the hybridization of the O atom in the C O double bonds?

  • Asp2
  • Bsp3d2
  • Csp
  • Dsp3d
  • Esp3

Why may the N atoms be described as sp2 hybridized?

  • AThe bonds between the N atoms and the carbonyl C atoms are partial double bonds.
  • BA trigonal planar shape minimizes strain in the five-membered ring.
  • C N atoms with three bonds are always sp2 hybridized.
  • DThe bonds between the N atoms and the alkyl C atoms are partial double bonds.
  • EA trigonal planar shape maximizes the separation of the lone and bonding electron pairs.

Q2:

Propene, ethene, and methane can be produced by the thermal cracking of propane:

For each propane molecule, how many atoms undergo a change in hybridization during this reaction?

Q3:

Why is the concept of hybridization required in valence bond theory?

  • ATo explain the geometry of bonding orbitals
  • BTo explain the polarity of chemical bonds
  • CTo explain the relative energies of bonding orbitals
  • DTo explain the existence of nonbonding orbitals
  • ETo explain the existence of degenerate bonding orbitals

Q4:

Acetonitrile contains one C C single bond and one C N triple bond.

Which orbitals of the C atoms overlap to form the C C bond?

  • Asp and sp3
  • Bsp3 and p
  • Csp3 and sp3
  • Dp and p
  • Esp2 and sp3

Which orbital of the C atom contributes to the C N 𝜎 bond?

  • Asp
  • Bp
  • Cs
  • Dsp3
  • Esp2

Which orbitals of the C atom contribute to the C N πœ‹ bonds?

  • Ap
  • Bsp3
  • Cs
  • Dsp2
  • Esp

Q5:

The hybridization of the central atom is the same in all but one of the following molecules and ions. In which species is the hybridization different?

  • ASulfite
  • BAluminum trichloride
  • CSulfur trioxide
  • DCarbonate
  • ENitrate

Q6:

Which of the following sets of carbon atoms cannot produce a neutral molecule with the molecular formula C H 8 1 0 ? Note that the molecule may contain rings.

  • ATwo sp3 atoms, two sp2 atoms, and four sp atoms
  • BFour sp3 atoms, two sp2 atoms, and two sp atoms
  • CTwo sp3 atoms, four sp2 atoms, and two sp atoms
  • DFour sp3 atoms and four sp atoms
  • ETwo sp3 atoms and six sp2 atoms

Q7:

Nitrogen and phosphorus are Group 15 elements, but nitrogen forms only three bonds, while phosphorus can form up to five. What accounts for the ability of phosphorus to form more bonds?

  • APhosphorus has an additional electron shell.
  • BPhosphorus has two more valence electrons than nitrogen.
  • CNitrogen has three unpaired electrons in its ground state.
  • DPhosphorus is more electronegative than nitrogen.

Q8:

The hybridization of the non-hydrogen atom is the same in all but one of the following molecules. In which molecule is the hybridization different?

  • A A l H 3
  • B B H 2 6
  • C N H 3
  • D P H 3
  • E H O 2

Q9:

Methyl isocyanate has the shown structural formula:

C N H H H C O

The C O and two C N 𝜎 bonds lie in a single plane parallel to the π‘₯ - and 𝑦 -axes and perpendicular to the 𝑧 -axis. The π‘₯ -axis is parallel to the C O bond.

What is the hybridization of the C atom in the isocyanate group?

  • Asp
  • Bsp3d2
  • Csp2
  • Dsp3d
  • Esp3

What is the hybridization of the N atom in the isocyanate group?

  • Asp2
  • Bsp3d2
  • Csp
  • Dsp3d
  • Esp3

Which axis is parallel to the p orbitals that overlap to form the C N πœ‹ bond?

  • A 𝑧
  • B π‘₯ - 𝑧 diagonal
  • C π‘₯
  • D 𝑦 - 𝑧 diagonal
  • E 𝑦

Which axis is parallel to the p orbitals that overlap to form the C O πœ‹ bond?

  • A 𝑦
  • B π‘₯ - 𝑧 diagonal
  • C π‘₯
  • D 𝑦 - 𝑧 diagonal
  • E 𝑧

Q10:

The hybridization of the central atom ( B , C , or N ) is the same in all but one of the following molecules. In which species is the hybridization different?

  • A B ( O H ) 4
  • B B ( O H ) 3
  • C H N O 2
  • D H N O 3
  • E H C O 2 3

Q11:

The tetrathionate anion contains two types of S atoms:

O S S O O S S 2 – O O O

What is the hybridization of the S atoms in the S O bonds?

  • A sp3
  • B sp3d2
  • C sp
  • D sp3d
  • E sp2

What term best describes the bonding geometry around the S atoms in the S O bonds?

  • ATetrahedral
  • BOctahedral
  • CSquare pyramidal
  • DSquare planar
  • ETrigonal pyramidal

What is the hybridization of the S atoms with two S S bonds?

  • Asp3
  • Bsp3d2
  • Csp
  • Dsp3d
  • Esp2

What term best describes the bonding geometry around the S atoms with two S S bonds?

  • ABent
  • BT-shaped
  • CLinear
  • DSeesaw
  • ETetrahedral
Preview