Answers: 1
". A compound with only single bonds between its atoms will have all the bonds as sigma bonds.
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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How many σ bonds are there in each molecule ethane ethylene acetylene?...
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