Lesson Worksheet: Hybridization Chemistry

In this worksheet, we will practice explaining and identifying hybridization of atomic orbitals.

Q1:

How many 𝜎 bonds and 𝜋 bonds are in 13,-pentadiene, HCCHCHCHCH23?

  • A2 𝜎 bonds and 12 𝜋 bonds
  • B10 𝜎 bonds and 2 𝜋 bonds
  • C12 𝜎 bonds and 2 𝜋 bonds
  • D2 𝜎 bonds and 10 𝜋 bonds

Q2:

Which of the following is not true about an sp hybrid orbital?

  • AAn s orbital overlaps with three p orbitals, forming a set of four hybridised orbitals. Each of them is called an sp hybrid orbital.
  • BHybridisation occurs to form an sp hybrid orbital due to s orbitals and p orbitals being of close energies to each other.
  • CThe angle between each 2 hybrid orbitals (sp) is equal to 109.5.
  • DAn s orbital overlaps with three p orbitals, forming a set of three hybridised orbitals. Each of them is called an sp hybrid orbital.

Q3:

How many sigma bonds and pi bonds are formed in an ethylene molecule, HCCH22?

  • A5 sigma bonds and only 1 pi bond
  • B4 sigma bonds and 2 pi bonds
  • C3 sigma bonds and only 1 pi bond
  • D6 sigma bonds and no pi bonds

Q4:

Which of the following is correct about the structure of acetylene (CH22)?

  • AThe two carbon atoms are bonded by sp hybrid orbitals.
  • BThe two carbon atoms are bonded by one sigma bond and one pi bond.
  • CThe two carbon atoms are bonded by sp hybrid orbitals.
  • DThe two carbon atoms are bonded by sp hybrid orbitals.

Q5:

What is the number of 𝜎 bonds in an acetylene molecule?

HCCH

  • A1
  • B5
  • C2
  • D3

Q6:

How many 𝜎 and 𝜋 bonds are there in the given structure?

CCCNCCHHHHH
  • A8 𝜎 and 3 𝜋 bonds
  • B3 𝜎 and 3 𝜋 bonds
  • C6 𝜎 and 3 𝜋 bonds
  • D11 𝜎 and 3 𝜋 bonds

Q7:

What are the types of hybridisation in carbon atoms numbers 1 and 2?

123CH3CCON
  • ACarbon atom 1: sp, carbon atom 2: sp
  • BCarbon atom 1: sp, carbon atom 2: sp
  • CCarbon atom 1: sp, carbon atom 2: sp
  • DCarbon atom 1: sp, carbon atom 2: sp

Q8:

The hybridisation of CH22 and CO2 molecules is the same. Which of the following is correct? [H=1, C=6, O=8].

  • AThe hybridisation of a carbon atom in the two molecules is sp and the molecular geometry is linear.
  • BThe hybridisation of a carbon atom in the two molecules is sp and the molecular geometry is a planar triangle.
  • CThe hybridisation of a carbon atom in the two molecules is sp and the molecular geometry is a planar triangle.
  • DThe hybridisation of a carbon atom in the two molecules is sp and the molecular geometry is linear.

Q9:

Which of the following choices represents the correct Lewis structure and the number of sigma bonds of a carbon dioxide molecule (CO)2? [C=6, O=8].

  • AChoice B
  • BChoice D
  • CChoice C
  • DChoice A

Q10:

A sigma bond is created when specific combinations of atomic orbitals overlap.

Which of the following occurrences does not result in the formation of a 𝜎 bond?

  • AA hybrid sp orbital overlapping with another hybrid sp orbital
  • BAn s orbital overlapping with a p orbital
  • CA p orbital overlapping with another p orbital side by side
  • DAn s orbital overlapping with another s orbital
  • EA p orbital overlapping with another p orbital end to end

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