Sigma and Pi Bonding

A triple bond is composed of

• 1 sigma bond

• 1 pi bond

• 2 pi bonds

• 1 sigma and 2 pi bonds

Count the number of sigma and pi bonds in this molecule:

• 13 sigma, 1 pi

• 14 sigma, 2 pi

• 1 sigma, 14 pi

• 2 sigma, 13 pi

A single bond is composed of

• 1 sigma bond

• 1 pi bond

• 1 sigma and 1 pi bond

• no sigma or pi bonds

What type of bond is formed by the head-on overlap of atomic orbitals?

• Sigma bond

• Pi bond

• Delta bond

• Phi bond

Which of the following statements is true about sigma bonds?

• They are formed by the lateral overlap of orbitals.

• They have a cylindrical symmetry around the bond axis.

• They are weaker than pi bonds.

• They do not allow free rotation of bonded atoms.

In a double bond, how many sigma and pi bonds are present?

• 1 sigma and 1 pi bond

• 2 sigma bonds

• 2 pi bonds

• 1 sigma and 2 pi bonds

Which type of bond allows for free rotation around the bond axis?

• Sigma bond

• Pi bond

• Delta bond

• Hydrogen bond

What is the main difference in the formation of sigma and pi bonds?

• Sigma bonds involve head-on overlap; pi bonds involve side-to-side overlap.

• Sigma bonds involve side-to-side overlap; pi bonds involve head-on overlap.

• Both involve head-on overlap.

• Both involve side-to-side overlap.

Which bond is generally stronger, sigma or pi bond?

• Sigma bond

• Pi bond

• Both are equally strong

• Neither, they are different types of bonds

In molecular orbital theory, which bond is formed first between two atoms?

• Sigma bond

• Pi bond

• Delta bond

• Phi bond