
(a)
Interpretation:
The number of pi bonds and sigma bonds present in the given molecule has to be calculated.
Concept introduction:
Sigma bond: The formation of a molecular orbital by the end to end overlap of atomic orbitals is known as sigma bond.
Pi bond: The formation of a molecular orbital by the side to side overlap of atomic orbitals along a plane perpendicular to line connecting the nuclei of the atoms is known as pi bond.
While calculating sigma bonds and pi bonds in a molecule, we must keep in mind the following points.
- Single bond always contains 1 sigma bond
- Double bond always contains 1 sigma bond and 1 pi bond
- Triple bond always contains 1 sigma bond and 2 pi bonds
To determine number of pi bonds and sigma bonds
(b)
Interpretation:
The number of pi bonds and sigma bonds present in the given molecule has to be calculated.
Concept introduction:
Sigma bond: The formation of a molecular orbital by the end to end overlap of atomic orbitals is known as sigma bond.
Pi bond: The formation of a molecular orbital by the side to side overlap of atomic orbitals along a plane perpendicular to line connecting the nuclei of the atoms is known as pi bond.
While calculating sigma bonds and pi bonds in a molecule, we must keep in mind the following points.
- Single bond always contains 1 sigma bond
- Double bond always contains 1 sigma bond and 1 pi bond
- Triple bond always contains 1 sigma bond and 2 pi bonds
To determine number of pi bonds and sigma bonds
(c)
Interpretation:
The number of pi bonds and sigma bonds present in the given molecule has to be calculated.
Concept introduction:
Sigma bond: The formation of a molecular orbital by the end to end overlap of atomic orbitals is known as sigma bond.
Pi bond: The formation of a molecular orbital by the side to side overlap of atomic orbitals along a plane perpendicular to line connecting the nuclei of the atoms is known as pi bond.
While calculating sigma bonds and pi bonds in a molecule, we must keep in mind the following points.
- Single bond always contains 1 sigma bond
- Double bond always contains 1 sigma bond and 1 pi bond
- Triple bond always contains 1 sigma bond and 2 pi bonds
To determine number of pi bonds and sigma bonds

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Chapter 7 Solutions
Chemistry: Atoms First
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