How many pi pi bonds are there in an alkene wit... - JAMB Chemistry 2023 Question

An alkene with six carbon atoms has the chemical formula C₆H₁₂. The general formula for an alkene is CnH2n, where "n" is the number of carbon atoms.

In this case, n = 6, so the formula is C₆H₁₂. Each carbon-carbon double bond (C=C) in an alkene contains one pi (\(\pi\)) bond. Since there are two carbon atoms involved in each double bond, the number of pi bonds is equal to half the number of carbon-carbon double bonds.

For a molecule with 6 carbon atoms, there are 5 carbon-carbon double bonds (C=C). Therefore, the number of pi (\(\pi\)) bonds is 5/2, which is 2.5.

However, since pi bonds cannot exist in fractional amounts, we round down to the nearest whole number. Therefore, an alkene with six carbon atoms has 2 pi (\(\pi\)) bonds.

So, the correct answer is 4.