How many σ bonds are there in each molecule ethane ethylene acetylene?

Explanation:

When there occurs head-on overlapping between the atomic orbitals then the bond formed is known as a sigma bond.

A sigma bond is represented by the symbol "". A compound with only single bonds between its atoms will have all the bonds as sigma bonds.

A double bond has one sigma and one pi bond. Whereas a triple bond will have one sigma and two pi bonds.

Hence, number of sigma bonds present in the given compounds will be as follows.

As the chemical formula of ethane is and it contains only single bonds. Hence, in a molecule of ethane there are 7 sigma bonds. Chemical formula of ethylene is and it contains one double bond. Hence, total number of sigma bonds present in a molecule of ethylene are 5 and there is one pi bond also.Chemical formula of acetylene is . There is one triple bond present in it. So, the total number of sigma bonds present in a molecule of acetylene is 3 and there are 2 pi bonds also.

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