How many sigma bonds are there in CH2 = CH - CH = CH2

Explanation

The molecule CH2=CH-CH=CH2 consists of four carbon atoms and four hydrogen atoms. Each carbon atom forms single sigma bonds with hydrogen atoms:The first carbon (CH2) forms 2 sigma bonds with hydrogen.The second carbon (CH) forms 1 sigma bond with hydrogen.The third carbon (CH) forms 1 sigma bond with hydrogen.The fourth carbon (CH2) forms 2 sigma bonds with hydrogen.Additionally, each double bond consists of one sigma bond and one pi bond between adjacent carbon atoms:There are 3 carbon-carbon sigma bonds in the molecule (one for each pair of adjacent carbon atoms).Adding all the sigma bonds together, we have 2 + 1 + 1 + 2 (from C-H) + 3 (from C-C) = 9 sigma bonds in total.Options 6, 11, and 4 are incorrect because they either underestimate or overestimate the number of sigma bonds by not accurately accounting for all the bonds present in the molecule.